Be more specific on Darwin

overlays/hms.nix

@@ -3,16 +3,19 @@
 pkgs.writeShellScriptBin "hms" ''
 set -eo pipefail
 # Build different targets with GUI or not
-if [ -z "$DISPLAY" ]; then
-	target="nogui"
-else
-	target="gui"
-fi
 
+arch="$(uname -m)"
 if [ "$(uname -s)" == "Darwin" ]; then
+	# On macOS
 	src="$HOME/.config/nix/"
-	target=gui
+	target="''${arch}-darwin"
 else
+	# On Linux/WSL2 systems
+	if [ -z "$DISPLAY" ]; then
+		target="''${arch}-nogui"
+	else
+		target="''${arch}-gui"
+	fi
 	src=/etc/nixos
 fi
 
@@ -20,7 +23,7 @@ fi
 echo "Building $(uname -m)-$target"
 dest=$(mktemp -d)
 pushd "$dest" > /dev/null
-nix build --impure "$src#homeConfigurations.$(uname -m)-$target.activationPackage"
+nix build --impure "$src#homeConfigurations.$target.activationPackage"
 ./result/activate
 popd > /dev/null
 rm -r "$dest"