Do not allow unfree (except steam)

flake.nix

@@ -37,7 +37,6 @@
     system = "x86_64-linux";
     pkgs = import nixpkgs {
       inherit system;
-      config.allowUnfree = true;
     };
     lib = nixpkgs.lib;
   in {

modules/core/nix.nix

@@ -1,5 +1,15 @@
-{username, ...}: {
+{
+  username,
+  lib,
+  ...
+}: {
   nix.settings = {
     trusted-users = ["${username}"];
   };
+
+  nixpkgs.config.allowUnfreePredicate = pkg:
+    builtins.elem (lib.getName pkg) [
+      "steam"
+      "steam-unwrapped"
+    ];
 }

modules/home/gaming.nix

@@ -24,17 +24,12 @@
     vitetris
     nethack
 
-    ## Celeste
-    celeste-classic
-    celeste-classic-pm
-
     ## Doom
     # gzdoom
     crispy-doom
 
     ## Emulation
     sameboy
-    snes9x
     cemu
     dolphin-emu
     ryujinx

modules/home/retroarch.nix

@@ -5,7 +5,6 @@
         fceumm
         gambatte
         mgba
-        snes9x
       ]))
   ];
 }

modules/home/vscodium.nix

@@ -14,8 +14,6 @@
         # python
         ms-python.python
         ms-python.black-formatter
-        # C/C++
-        ms-vscode.cpptools
                 # OCaml
         ocamllabs.ocaml-platform
         # CMake