diff --git a/builtinModules/formatter.nix b/builtinModules/formatter.nix
index 0c379b6..77b69fa 100644
--- a/builtinModules/formatter.nix
+++ b/builtinModules/formatter.nix
@@ -30,7 +30,7 @@ in
     (mkIf (config.formatters != null) {
       perSystem = { pkgs, lib, fd, coreutils, ... }: {
         formatter = mkDefault (pkgs.writeShellScriptBin "formatter" ''
-          PATH=${lib.makeBinPath (config.devShell.packages pkgs)}
+          PATH=${lib.makeBinPath ((config.devShell.packages or (_: [ ])) pkgs)}
           for f in "$@"; do
             if [ -d "$f" ]; then
               ${fd}/bin/fd "$f" -Htf -x "$0" &
diff --git a/tests/default.nix b/tests/default.nix
index 705d099..a35158d 100644
--- a/tests/default.nix
+++ b/tests/default.nix
@@ -509,7 +509,16 @@ in
   formatters-fn = test
     (flakelight ./empty {
       formatters = { rustfmt, ... }: {
-        "*.rs" = "rustfmt";
+        "*.rs" = "${rustfmt}";
+      };
+    })
+    (f: lib.isDerivation f.formatter.x86_64-linux);
+
+  formatters-no-devshell = test
+    (flakelight ./empty {
+      devShell = lib.mkForce null;
+      formatters = { rustfmt, ... }: {
+        "*.rs" = "${rustfmt}";
       };
     })
     (f: lib.isDerivation f.formatter.x86_64-linux);