diff --git a/pkgs/development/libraries/gstreamer/core/default.nix b/pkgs/development/libraries/gstreamer/core/default.nix
index f4810feada87fc..9c4f3ee0251d53 100644
--- a/pkgs/development/libraries/gstreamer/core/default.nix
+++ b/pkgs/development/libraries/gstreamer/core/default.nix
@@ -99,7 +99,7 @@ stdenv.mkDerivation rec {
   postInstall = ''
     for prog in "$dev/bin/"*; do
         # We can't use --suffix here due to quoting so we craft the export command by hand
-        wrapProgram "$prog" --run "export GST_PLUGIN_SYSTEM_PATH=\$GST_PLUGIN_SYSTEM_PATH"$\{GST_PLUGIN_SYSTEM_PATH:+:\}"\$(unset _tmp; for profile in \$NIX_PROFILES; do _tmp="\$profile/lib/gstreamer-1.0''$\{_tmp:+:\}\$_tmp"; done; printf "\$_tmp")"
+        wrapProgram "$prog" --run 'export GST_PLUGIN_SYSTEM_PATH=$GST_PLUGIN_SYSTEM_PATH''${GST_PLUGIN_SYSTEM_PATH:+:}$(unset _tmp; for profile in $NIX_PROFILES; do _tmp="$profile/lib/gstreamer-1.0''${_tmp:+:}$_tmp"; done; printf '%s' "$_tmp")'
     done
   '';