diff --git a/pkgs/by-name/pr/proton-ge-bin/package.nix b/pkgs/by-name/pr/proton-ge-bin/package.nix
index 92c841349a4a..68e147ca4f9c 100644
--- a/pkgs/by-name/pr/proton-ge-bin/package.nix
+++ b/pkgs/by-name/pr/proton-ge-bin/package.nix
@@ -17,8 +17,9 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   buildCommand = ''
     runHook preBuild
 
-    # Intentionally empty
-    mkdir -p $out
+    # Make it impossible to add to an environment. You should use the appropriate NixOS option.
+    # Also leave some breadcrumbs in the file.
+    echo "${finalAttrs.pname} should not be installed into environments. Please use programs.steam.extraCompatPackages instead." > $out
 
     ln -s $src $steamcompattool
 
@@ -42,7 +43,11 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   '';
 
   meta = {
-    description = "Compatibility tool for Steam Play based on Wine and additional components";
+    description = ''
+      Compatibility tool for Steam Play based on Wine and additional components.
+
+      (This is intended for use in the `programs.steam.extraCompatPackages` option only.)
+    '';
     homepage = "https://github.com/GloriousEggroll/proton-ge-custom";
     license = lib.licenses.bsd3;
     maintainers = with lib.maintainers; [ NotAShelf shawn8901 ];