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-rw-r--r--pkgs/build-support/emacs/melpa2nix.el26
1 files changed, 13 insertions, 13 deletions
diff --git a/pkgs/build-support/emacs/melpa2nix.el b/pkgs/build-support/emacs/melpa2nix.el
index 3de77dbf5e5c6..72667dea652c1 100644
--- a/pkgs/build-support/emacs/melpa2nix.el
+++ b/pkgs/build-support/emacs/melpa2nix.el
@@ -11,22 +11,22 @@
 ;; Allow installing package tarfiles larger than 10MB
 (setq large-file-warning-threshold nil)
 
-(defun melpa2nix-build-package-1 (rcp)
-  (let* ((default-directory (package-recipe--working-tree rcp)))
+(defun melpa2nix-build-package-1 (rcp version commit)
+  (let ((source-dir (package-recipe--working-tree rcp)))
     (unwind-protect
         (let ((files (package-build-expand-files-spec rcp t)))
-          (unless files
-            (error "Unable to find files matching recipe patterns"))
-          (if (> (length files) 1)
-              (package-build--build-multi-file-package rcp files)
-            (package-build--build-single-file-package rcp files))))))
+          (cond
+           ((= (length files) 1)
+            (package-build--build-single-file-package
+             rcp version commit files source-dir))
+           ((> (length files) 1)
+            (package-build--build-multi-file-package
+             rcp version commit files source-dir))
+           (t (error "Unable to find files matching recipe patterns")))))))
 
 (defun melpa2nix-build-package ()
-  (unless noninteractive
-    (error "`melpa2nix-build-package' is to be used only with -batch"))
+  (if (not noninteractive)
+      (error "`melpa2nix-build-package' is to be used only with -batch"))
   (pcase command-line-args-left
     (`(,package ,version ,commit)
-     (let ((recipe (package-recipe-lookup package)))
-       (setf (oref recipe commit) commit)
-       (setf (oref recipe version) version)
-       (melpa2nix-build-package-1 recipe)))))
+     (melpa2nix-build-package-1 (package-recipe-lookup package) version commit))))