Fix stashpad derivation
diff --git a/src/packages/stashpad.nix b/src/packages/stashpad.nix
index eecf15b..d6d9975 100644
--- a/src/packages/stashpad.nix
+++ b/src/packages/stashpad.nix
@@ -1,5 +1,5 @@
 { pkgs, ... }: pkgs.appimageTools.wrapType1 {
   name = "StashPad";
-  src = "./stashpad/StashPad.AppImage";
+  src = ./stashpad/StashPad.AppImage;
   extraPkgs = pkgs: with pkgs; [ ];
 }