diff --git a/pkgs/applications/misc/nwg-look/default.nix b/pkgs/applications/misc/nwg-look/default.nix
index 50bfa5f123dd..21b5a7a83324 100644
--- a/pkgs/applications/misc/nwg-look/default.nix
+++ b/pkgs/applications/misc/nwg-look/default.nix
@@ -31,7 +31,7 @@ buildGoModule rec {
   patches = [ ./fix-paths.patch ];
 
   postPatch = ''
-    sed -i 's|@out@|'"''${out}"'|g' main.go tools.go
+    substituteInPlace main.go tools.go --replace '@out@' $out
   '';
 
   ldflags = [ "-s" "-w" ];