diff --git a/pkgs/by-name/it/itsycal/package.nix b/pkgs/by-name/it/itsycal/package.nix
index 7e8d5b09002b..cbb462430a43 100644
--- a/pkgs/by-name/it/itsycal/package.nix
+++ b/pkgs/by-name/it/itsycal/package.nix
@@ -6,18 +6,18 @@
 
 stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "itsycal";
-  version = "0.15.4";
+  version = "0.15.5";
 
   src = fetchzip {
     url = "https://itsycal.s3.amazonaws.com/Itsycal-${finalAttrs.version}.zip";
-    hash = "sha256-+Pi74xP5BcjhgtR3YCqJknl54wdNIU8ekEwQUaFp4T8=";
+    hash = "sha256-kRO9zcyi8Di0NNuT158htKXt4wo7nVys+AV+1EgS1ZI=";
   };
 
   installPhase = ''
     runHook preInstall
 
-    mkdir -p $out/Applications/Itsycal.app
-    cp -R . $out/Applications/Itsycal.app
+    mkdir -p "$out/Applications/Itsycal.app"
+    cp -R . "$out/Applications/Itsycal.app"
 
     runHook postInstall
   '';