diff --git a/pkgs/by-name/co/cosmic-bg/package.nix b/pkgs/by-name/co/cosmic-bg/package.nix
index f81daf1fc9fb..962dd5d91f1b 100644
--- a/pkgs/by-name/co/cosmic-bg/package.nix
+++ b/pkgs/by-name/co/cosmic-bg/package.nix
@@ -3,6 +3,7 @@
   stdenv,
   fetchFromGitHub,
   rustPlatform,
+  cosmic-wallpapers,
   libcosmicAppHook,
   just,
   nasm,
@@ -21,6 +22,12 @@ rustPlatform.buildRustPackage (finalAttrs: {
     hash = "sha256-4b4laUXTnAbdngLVh8/dD144m9QrGReSEjRZoNR6Iks=";
   };
 
+  postPatch = ''
+    substituteInPlace config/src/lib.rs data/v1/all \
+      --replace-fail '/usr/share/backgrounds/cosmic/orion_nebula_nasa_heic0601a.jpg' \
+      "${cosmic-wallpapers}/share/backgrounds/cosmic/orion_nebula_nasa_heic0601a.jpg"
+  '';
+
   useFetchCargoVendor = true;
   cargoHash = "sha256-GLXooTjcGq4MsBNnlpHBBUJGNs5UjKMQJGJuj9UO2wk=";