fix(tf2): unpack tarballs

modules/home/users/crumb/tf2.nix

@@ -12,9 +12,10 @@ in {
     (let
       tf2pkgs = inputs.tf2-nix.packages.x86_64-linux;
       tgz = x: pkgs.runCommand "source" {} ''
-        mkdir $out
-        cd $out
-        tar xzvf "${x}"
+        tarball="${x}"
+        tar xzf "$tarball"
+        base="$(stripHash "$tarball")"
+        mv "''${base%.tar.gz}" $out
       '';
       my-config = tf2pkgs.mergeTf2Configs (with tf2pkgs; [
           mastercomfig.presets.medium-low