diff --git a/pkgs/by-name/co/cosmic-session/package.nix b/pkgs/by-name/co/cosmic-session/package.nix
index 13116e329ed9..18d553b2f0a9 100644
--- a/pkgs/by-name/co/cosmic-session/package.nix
+++ b/pkgs/by-name/co/cosmic-session/package.nix
@@ -51,7 +51,7 @@ rustPlatform.buildRustPackage (finalAttrs: {
   ];
 
   env = {
-    XDP_COSMIC = lib.getExe xdg-desktop-portal-cosmic;
+    XDP_COSMIC = "${xdg-desktop-portal-cosmic}/libexec/xdg-desktop-portal-cosmic";
     ORCA = "orca"; # get orca from $PATH
   };