diff --git a/pkgs/build-support/build-mozilla-mach/default.nix b/pkgs/build-support/build-mozilla-mach/default.nix
index 297de1b5b458..2c1276a886e6 100644
--- a/pkgs/build-support/build-mozilla-mach/default.nix
+++ b/pkgs/build-support/build-mozilla-mach/default.nix
@@ -658,9 +658,6 @@ buildStdenv.mkDerivation {
       # Remove SDK cruft. FIXME: move to a separate output?
       rm -rf $out/share/idl $out/include $out/lib/${binaryName}-devel-*
 
-      # Needed to find Mozilla runtime
-      gappsWrapperArgs+=(--argv0 "$out/bin/.${binaryName}-wrapped")
-
       resourceDir=$out/lib/${binaryName}
     ''
     + ''