diff --git a/flake.nix b/flake.nix
index ace9e87..8ffb68a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -98,8 +98,9 @@
             ./static;
 
           buildInputs = [ pkgs.pngcrush ];
-          buildPhase =
-            "find . -type f -name '*.png' | xargs -n 1 pngcrush -ow -brute";
+          buildPhase = ''
+            find . -type f -name '*.png' | xargs -n 1 pngcrush -ow -brute
+          '';
 
           installPhase = ''
             mkdir -p $out/share/bytes.zone