nix-buffer support: Make process-environment changes actually local

(cherry picked from commit f087b75)
NixOS · Mar 25, 2017 · 818c0e2 · 818c0e2
1 parent 3a0a58c
commit 818c0e2
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/pkgs/build-support/emacs/buffer.nix b/pkgs/build-support/emacs/buffer.nix
@@ -39,6 +39,8 @@
       (make-local-variable 'process-environment)
       (put 'process-environment 'permanent-local t)
       (inherit-local 'process-environment)
+      ; setenv modifies in place, so copy the environment first
+      (setq process-environment (copy-tree process-environment))
       (setenv "PATH" (concat "${lib.makeSearchPath "bin" pkgs}:" (getenv "PATH")))
       (inherit-local-permanent exec-path (append '(${builtins.concatStringsSep " " (map (p: "\"${p}/bin\"") pkgs)}) exec-path))