Fix nix-system in nix-2.4

NixOS · May 23, 2021 · e4844f7 · e4844f7
1 parent 04d9a86
commit e4844f7
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/nix.el b/nix.el
@@ -61,7 +61,9 @@
 (defun nix-system ()
   "Get the current system tuple."
   (with-temp-buffer
-    (call-process nix-executable nil (list t nil) nil "eval" "--raw" "(builtins.currentSystem)")
+    (if (nix-is-24)
+	(call-process nix-executable nil (list t nil) nil "eval" "--impure" "--raw" "--expr" "(builtins.currentSystem)")
+      (call-process nix-executable nil (list t nil) nil "eval" "--raw" "(builtins.currentSystem)"))
     (buffer-string)))
 
 (defvar nix-version nil)