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diff --git a/guix-science/packages/physics.scm b/guix-science/packages/physics.scm
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+;;;
+;;; Copyright © 2022 Emmanuel Medernach <Emmanuel.Medernach@iphc.cnrs.fr>
+;;; Copyright © 2023-2024 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 <http://www.gnu.org/licenses/>.
+
+(define-module (guix-science packages physics)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (guix build-system cmake)
+  #:use-module (guix git-download)
+  #:use-module (guix packages))
+
+(define (replace-char old-char new-char str)
+  (string-map (lambda (char)
+                (if (char=? char old-char) new-char char)) str))
+
+(define-public clhep-2.4.6
+  (package
+    (name "clhep")
+    (version "2.4.6.2")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://gitlab.cern.ch/CLHEP/CLHEP")
+             (commit (string-append "CLHEP_"
+                                    (replace-char #\. #\_ version)))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "06mpvpb5ywx8j5cpddh9sb415h02mim3ip1sd895q94pxci2jr92"))))
+    (build-system cmake-build-system)
+    (home-page "https://proj-clhep.web.cern.ch/proj-clhep/")
+    (synopsis "HEP-specific foundation and utility classes")
+    (description
+     "CLHEP is a set of HEP-specific foundation and utility classes such as
+random generators, physics vectors, geometry and linear algebra.
+CLHEP is structured in a set of packages independent of any external
+package.")
+    (license license:gpl3+)))
+
+(define-public clhep-2.4.7
+  (package
+    (inherit clhep-2.4.6)
+    (version "2.4.7.1")
+    (source
+     (origin
+       (inherit (package-source clhep-2.4.6))
+       (uri (git-reference
+             (url "https://gitlab.cern.ch/CLHEP/CLHEP")
+             (commit (string-append "CLHEP_"
+                                    (replace-char #\. #\_ version)))))
+       (sha256
+        (base32 "13la49jnadsi5f2a70qagv87j7qzcpdccmbp2lyscaxlkmzy253z"))))))
+
+(define-public clhep clhep-2.4.7)