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-rw-r--r--pkgs/build-support/emacs/melpa2nix.el5
1 files changed, 4 insertions, 1 deletions
diff --git a/pkgs/build-support/emacs/melpa2nix.el b/pkgs/build-support/emacs/melpa2nix.el
index 99c755e2afc..bd2aadd5aeb 100644
--- a/pkgs/build-support/emacs/melpa2nix.el
+++ b/pkgs/build-support/emacs/melpa2nix.el
@@ -12,5 +12,8 @@
   (if (not noninteractive)
       (error "`melpa2nix-build-package' is to be used only with -batch"))
   (pcase command-line-args-left
-    (`(,package ,version)
+    (`(,package ,version ,commit)
+     ;; Monkey-patch package-build so it doesn't shell out to git/hg.
+     (defun package-build--get-commit (&rest _)
+       commit)
      (package-build--package (package-recipe-lookup package) version))))