diff --git a/pkgs/by-name/re/rectangle/package.nix b/pkgs/by-name/re/rectangle/package.nix
index 31b35cb8a3d9..a2a2f9bfd991 100644
--- a/pkgs/by-name/re/rectangle/package.nix
+++ b/pkgs/by-name/re/rectangle/package.nix
@@ -22,8 +22,8 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   installPhase = ''
     runHook preInstall
 
-    mkdir -p $out/Applications
-    mv Rectangle.app $out/Applications
+    mkdir -p "$out/Applications"
+    mv Rectangle.app "$out/Applications"
 
     runHook postInstall
   '';