Change license header to a one-line ‘SPDX-License-Identifier’.

This change implements the consensus reached in the group.

Changes were made with this ed script:

  # Match the first empty line.
  /^$
  # Delete everything up to that line.
  1,.d
  # Insert the header.
  i
  ;;; SPDX-License-Identifier: GPL-3.0-or-later

  .
  # Done.
  wq

Fixes: guix-science/guix-science#196

30 files changed, 50 insertions, 447 deletions

diff --git a/README.rst b/README.rst
index d5d6915..17459cf 100644
--- a/README.rst
+++ b/README.rst
@@ -41,9 +41,30 @@ using:
 
 .. _Getting Substitutes from Other Servers: https://guix.gnu.org/manual/en/guix.html#Getting-Substitutes-from-Other-Servers
 
+.. _licensing:
+
+Licensing
+---------
+
+Like Guix itself, Guix-Science is distributed under the terms of the `GNU
+General Public License`, version 3 or (at your option) any later
+version.
+
+A copy of the license is included in the ``COPYING`` file, and each
+source file contains an `SPDX header` confirming its license.
+
+Copyright is held by the diverse group of copyright holders for the many
+contributions made to Guix-Science over time.
+
+.. _GNU General Public License_: https://www.gnu.org/licenses/gpl-3.0
+.. _SPDX header_: https://spdx.dev/learn/handling-license-info/
+
 Contributing
 ------------
 
+Contributors agree to provide their changes under the same license as
+the rest of Guix-Science—see :ref:`licensing`.
+
 We accept software fulfilling the following criteria:
 
 - `Free and open source`_. Use guix-science-nonfree_ otherwise.
diff --git a/guix-science/build-system/bazel.scm b/guix-science/build-system/bazel.scm
index 1f79fe3..0dd400d 100644
--- a/guix-science/build-system/bazel.scm
+++ b/guix-science/build-system/bazel.scm
@@ -1,20 +1,4 @@
-;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2024 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This file is part of GNU Guix.
-;;;
-;;; GNU Guix is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; GNU Guix is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science build-system bazel)
   #:use-module (guix base32)
diff --git a/guix-science/build/bazel-build-system.scm b/guix-science/build/bazel-build-system.scm
index 62683cc..46c44d4 100644
--- a/guix-science/build/bazel-build-system.scm
+++ b/guix-science/build/bazel-build-system.scm
@@ -1,20 +1,4 @@
-;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2024 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This file is part of GNU Guix.
-;;;
-;;; GNU Guix is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; GNU Guix is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science build bazel-build-system)
   #:use-module ((guix build gnu-build-system) #:prefix gnu:)
diff --git a/guix-science/packages/algebra.scm b/guix-science/packages/algebra.scm
index 6b49d00..289cfae 100644
--- a/guix-science/packages/algebra.scm
+++ b/guix-science/packages/algebra.scm
@@ -1,17 +1,4 @@
-;;; Copyright © 2025 Romain Garbage <romain.garbage@inria.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages algebra)
   #:use-module (guix)
diff --git a/guix-science/packages/bazel.scm b/guix-science/packages/bazel.scm
index 97bb32d..bac048a 100644
--- a/guix-science/packages/bazel.scm
+++ b/guix-science/packages/bazel.scm
@@ -1,17 +1,4 @@
-;;; Copyright © 2023, 2024 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages bazel)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/bioconductor.scm b/guix-science/packages/bioconductor.scm
index 9123ddf..a6b75bc 100644
--- a/guix-science/packages/bioconductor.scm
+++ b/guix-science/packages/bioconductor.scm
@@ -1,18 +1,4 @@
-;;;
-;;; Copyright © 2022-2025 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages bioconductor)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/bioinformatics.scm b/guix-science/packages/bioinformatics.scm
index 5715105..8322746 100644
--- a/guix-science/packages/bioinformatics.scm
+++ b/guix-science/packages/bioinformatics.scm
@@ -1,19 +1,4 @@
-;;; Copyright © 2016-2021 Roel Janssen <roel@gnu.org>
-;;; Copyright © 2022-2025 Ricardo Wurmus <rekado@elephly.net>
-;;; Copyright © 2024 Marco Baggio <guix@mawumag.com>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages bioinformatics)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/carputils.scm b/guix-science/packages/carputils.scm
index fe37fc8..f0b7f8c 100644
--- a/guix-science/packages/carputils.scm
+++ b/guix-science/packages/carputils.scm
@@ -1,17 +1,4 @@
-;;; Copyright © 2025 Julien Castelneau <julien.castelneau@inria.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages carputils)
   #:use-module (guix)
diff --git a/guix-science/packages/chemistry.scm b/guix-science/packages/chemistry.scm
index fae06b3..7b48278 100644
--- a/guix-science/packages/chemistry.scm
+++ b/guix-science/packages/chemistry.scm
@@ -1,19 +1,4 @@
-;;; Copyright © 2024 Dylan Bissuel <dylan.bissuel@univ-lyon1.fr>
-;;; Copyright © 2024 Benjamin Arrondeau <benjamin.arrondeau@univ-grenoble-alpes.fr>
-;;; Copyright © 2025 Romain Garbage <romain.garbage@inria.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages chemistry)
   #:use-module (guix)
diff --git a/guix-science/packages/cpp.scm b/guix-science/packages/cpp.scm
index a4253ef..731f25b 100644
--- a/guix-science/packages/cpp.scm
+++ b/guix-science/packages/cpp.scm
@@ -1,18 +1,4 @@
-;;; Copyright © 2025 Romain Garbage <romain.garbage@inria.fr>
-;;; Copyright © 2025 Benoît Martin <bmartin@cea.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages cpp)
   #:use-module ((guix licenses)
diff --git a/guix-science/packages/cran.scm b/guix-science/packages/cran.scm
index 32d178d..602ba7a 100644
--- a/guix-science/packages/cran.scm
+++ b/guix-science/packages/cran.scm
@@ -1,19 +1,4 @@
-;;; Copyright © 2020, 2021 Lars-Dominik Braun <ldb@leibniz-psychology.org>
-;;; Copyright © 2022-2025 Ricardo Wurmus <rekado@elephly.net>
-;;; Copyright © 2024 Marco Baggio <guix@mawumag.com>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages cran)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/electronics.scm b/guix-science/packages/electronics.scm
index 6bbce82..af7dd62 100644
--- a/guix-science/packages/electronics.scm
+++ b/guix-science/packages/electronics.scm
@@ -1,17 +1,4 @@
-;;; Copyright © 2024 Cayetano Santos <csantosb@inventati.org>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages electronics)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/electrophysiology.scm b/guix-science/packages/electrophysiology.scm
index 72ee4fc..558923d 100644
--- a/guix-science/packages/electrophysiology.scm
+++ b/guix-science/packages/electrophysiology.scm
@@ -1,17 +1,4 @@
-;;; Copyright © 2025 Ghislain Vaillant <ghislain.vaillant@inria.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages electrophysiology)
   #:use-module (gnu packages)
diff --git a/guix-science/packages/fortran.scm b/guix-science/packages/fortran.scm
index 652921c..4966634 100644
--- a/guix-science/packages/fortran.scm
+++ b/guix-science/packages/fortran.scm
@@ -1,19 +1,4 @@
-;;; Copyright © 2024 Dylan Bissuel <dylan.bissuel@univ-lyon1.fr>
-;;; Copyright © 2024 Benjamin Arrondeau <benjamin.arrondeau@univ-grenoble-alpes.fr>
-;;; Copyright © 2025 Romain Garbage <romain.garbage@inria.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages fortran)
   #:use-module (guix)
diff --git a/guix-science/packages/grid-engine.scm b/guix-science/packages/grid-engine.scm
index 7896783..a6e69bc 100644
--- a/guix-science/packages/grid-engine.scm
+++ b/guix-science/packages/grid-engine.scm
@@ -1,19 +1,4 @@
-;;;
-;;; Copyright © 2016-2021 Roel Janssen <roel@gnu.org>
-;;; Copyright © 2025 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages grid-engine)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/jasp.scm b/guix-science/packages/jasp.scm
index ee7c983..8fe5efd 100644
--- a/guix-science/packages/jasp.scm
+++ b/guix-science/packages/jasp.scm
@@ -1,19 +1,4 @@
-;;;
-;;; Copyright © 2020 Lars-Dominik Braun <ldb@leibniz-psychology.org>
-;;; Copyright © 2022 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 ;; JASP cannot be upstreamed, because it bundles several JavaScript libraries
 ;; in JASP-Desktop/html/js/ and Resources/Help/
diff --git a/guix-science/packages/jupyter-node.scm b/guix-science/packages/jupyter-node.scm
index 99c0ee6..927aee0 100644
--- a/guix-science/packages/jupyter-node.scm
+++ b/guix-science/packages/jupyter-node.scm
@@ -1,18 +1,4 @@
-;;;
-;;; Copyright © 2019, 2020 Lars-Dominik Braun <ldb@leibniz-psychology.org>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages jupyter-node)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/jupyter.scm b/guix-science/packages/jupyter.scm
index 752179f..0b2b5be 100644
--- a/guix-science/packages/jupyter.scm
+++ b/guix-science/packages/jupyter.scm
@@ -1,19 +1,4 @@
-;;;
-;;; Copyright © 2019, 2020 Lars-Dominik Braun <ldb@leibniz-psychology.org>
-;;; Copyright © 2022, 2025 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages jupyter)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/machine-learning.scm b/guix-science/packages/machine-learning.scm
index 646e05a..360284b 100644
--- a/guix-science/packages/machine-learning.scm
+++ b/guix-science/packages/machine-learning.scm
@@ -1,18 +1,4 @@
-;;; Copyright © 2023-2025 Ricardo Wurmus <rekado@elephly.net>
-;;; Copyright © 2024 Navid Afkhami <navid.afkhami@mdc-berlin.de>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages machine-learning)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/medical.scm b/guix-science/packages/medical.scm
index 11d52f6..a463555 100644
--- a/guix-science/packages/medical.scm
+++ b/guix-science/packages/medical.scm
@@ -1,18 +1,4 @@
-;;;
-;;; Copyright © 2025 Jake Forster <jakecameron.forster@gmail.com>
-;;;
-;;; This program is free software: you can redistribute it and/or modify
-;;; it under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation, either version 3 of the License, or
-;;; (at your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful,
-;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages medical)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/neuroscience.scm b/guix-science/packages/neuroscience.scm
index 35c054c..924c3fd 100644
--- a/guix-science/packages/neuroscience.scm
+++ b/guix-science/packages/neuroscience.scm
@@ -1,18 +1,4 @@
-;;; Copyright © 2024 Julien Castelneau <julien.castelneau@inria.fr>
-;;; Copyright © 2025 Ghislain Vaillant <ghislain.vaillant@inria.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages neuroscience)
   #:use-module (gnu packages)
diff --git a/guix-science/packages/physics.scm b/guix-science/packages/physics.scm
index a0acf20..eab2e33 100644
--- a/guix-science/packages/physics.scm
+++ b/guix-science/packages/physics.scm
@@ -1,23 +1,4 @@
-;;;
-;;; Copyright © 2022-2025 Emmanuel Medernach <Emmanuel.Medernach@iphc.cnrs.fr>
-;;; Copyright © 2023-2025 Jake Forster <jakecameron.forster@gmail.com>
-;;; Copyright © 2025 Lars Bilke <lars.bilke@ufz.de>
-;;; Copyright © 2025 Romain Garbage <romain.garbage@inria.fr>
-;;; Copyright © 2025 Ghislain Vaillant <ghislain.vaillant@inria.fr>
-;;; Copyright © 2025 Maurice Bremond <Maurice.Bremond@inria.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages physics)
   #:use-module (guix build-system cmake)
diff --git a/guix-science/packages/python-xyz.scm b/guix-science/packages/python-xyz.scm
index 6065fb5..92895d0 100644
--- a/guix-science/packages/python-xyz.scm
+++ b/guix-science/packages/python-xyz.scm
@@ -1,17 +1,4 @@
-;;; Copyright © 2025 Ghislain Vaillant <ghislain.vaillant@inria.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages python-xyz)
   #:use-module (gnu packages check)
diff --git a/guix-science/packages/python.scm b/guix-science/packages/python.scm
index e71d48e..a517146 100644
--- a/guix-science/packages/python.scm
+++ b/guix-science/packages/python.scm
@@ -1,19 +1,4 @@
-;;;
-;;; Copyright © 2016-2021 Roel Janssen <roel@gnu.org>
-;;; Copyright © 2023, 2024, 2025 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages python)
   #:use-module ((guix licenses) #:prefix license:)
diff --git a/guix-science/packages/rstudio-node.scm b/guix-science/packages/rstudio-node.scm
index 3dce93b..c88ee76 100644
--- a/guix-science/packages/rstudio-node.scm
+++ b/guix-science/packages/rstudio-node.scm
@@ -1,19 +1,4 @@
-;;;
-;;; Copyright © 2021 Lars-Dominik Braun <ldb@leibniz-psychology.org>
-;;; Copyright © 2024, 2025 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 ;; Packages in this module have been auto-imported by the npm-binary importer.
 
diff --git a/guix-science/packages/rstudio.scm b/guix-science/packages/rstudio.scm
index 267f3a1..58d344e 100644
--- a/guix-science/packages/rstudio.scm
+++ b/guix-science/packages/rstudio.scm
@@ -1,20 +1,4 @@
-;;;
-;;; Copyright © 2019, 2020 Lars-Dominik Braun <ldb@leibniz-psychology.org>
-;;; Copyright © 2020 Roel Janssen <roel@gnu.org>
-;;; Copyright © 2023, 2024 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 ;; RStudio server and its dependencies. Only the first level of dependencies is
 ;; built from source right now. Also RStudio itself bundles a lot of external
diff --git a/guix-science/packages/serialization.scm b/guix-science/packages/serialization.scm
index 3185607..8080fcc 100644
--- a/guix-science/packages/serialization.scm
+++ b/guix-science/packages/serialization.scm
@@ -1,18 +1,4 @@
-;;; Copyright © 2025 Romain Garbage <romain.garbage@inria.fr>
-;;; Copyright © 2025 Benoît Martin <bmartin@cea.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages serialization)
   #:use-module (guix)
diff --git a/guix-science/packages/siconos.scm b/guix-science/packages/siconos.scm
index d106553..4c9350c 100644
--- a/guix-science/packages/siconos.scm
+++ b/guix-science/packages/siconos.scm
@@ -1,17 +1,4 @@
-;;; Copyright © 2025 Maurice Bremond <Maurice.Bremond@inria.fr>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages siconos)
   #:use-module (guix build-system cmake)
diff --git a/guix-science/packages/typst.scm b/guix-science/packages/typst.scm
index 14c67de..304bff2 100644
--- a/guix-science/packages/typst.scm
+++ b/guix-science/packages/typst.scm
@@ -1,18 +1,4 @@
-;;;
-;;; Copyright © 2025 Alexis Simon <alexis.simon@runbox.com>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science packages typst)
   #:use-module (gnu packages rust-apps)
diff --git a/guix-science/services/rstudio.scm b/guix-science/services/rstudio.scm
index 1c10b29..a2089c5 100644
--- a/guix-science/services/rstudio.scm
+++ b/guix-science/services/rstudio.scm
@@ -1,17 +1,4 @@
-;;; Copyright © 2022 Ricardo Wurmus <rekado@elephly.net>
-;;;
-;;; This program is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;; SPDX-License-Identifier: GPL-3.0-or-later
 
 (define-module (guix-science services rstudio)
   #:use-module (gnu system pam)