diff --git a/devenv.nix b/devenv.nix
index 7d7a666..f37d3be 100644
--- a/devenv.nix
+++ b/devenv.nix
@@ -19,6 +19,10 @@
     build.exec = ''
       nixos-rebuild switch --sudo --flake '.#' $@
     '';
+    #
+    nix-build.exec = ''
+      NIXPKGS_ALLOW_UNFREE=1 nix build $1 -L --no-link --impure
+    '';
   };
 
   # https://devenv.sh/basics/