shell: '--export-manifest -D x -D y' generates a valid manifest.

* guix/scripts/shell.scm (manifest->code*): Add missing 'list' in
generated 'concatenate-manifests' call.
* tests/guix-shell-export-manifest.sh: Add test.

1 files changed, 5 insertions, 0 deletions

diff --git a/tests/guix-shell-export-manifest.sh b/tests/guix-shell-export-manifest.sh
index f83904deb40..05429955b9a 100644
--- a/tests/guix-shell-export-manifest.sh
+++ b/tests/guix-shell-export-manifest.sh
@@ -69,6 +69,11 @@ guix build -m "$manifest" -d | \
 guix build -m "$manifest" -d | \
     grep "$(guix build git -d)"
 
+guix shell --export-manifest -D guile -D python-itsdangerous > "$manifest"
+guix build -m "$manifest" -d | grep "$(guix build libffi -d)"
+guix build -m "$manifest" -d | \
+    grep "$(guix build -e '(@ (gnu packages python) python)' -d)"
+
 # Test various combinations to make sure generated code uses interfaces
 # correctly.
 for options in                                  \