fix mkPackages

move "lint" command to /packages

packages/lint/package.nix

@@ -0,0 +1,32 @@
+{
+  inputs,
+  nixfmt,
+  writeShellApplication,
+  deadnix,
+  statix,
+  fd,
+}:
+
+writeShellApplication {
+  name = "lint";
+  runtimeInputs = [
+    (nixfmt.overrideAttrs {
+      version = "0.6.0-${inputs.nixfmt.shortRev}";
+
+      src = inputs.nixfmt;
+    })
+    deadnix
+    statix
+    fd
+  ];
+  text = ''
+    if [ -z "''${1:-""}" ]; then
+      fd '.*\.nix' . -x statix fix -- {} \;
+      fd '.*\.nix' . -X deadnix -e -- {} \; -X nixfmt {} \;
+    else
+      statix fix -- "$1"
+      deadnix -e "$1"
+      nixfmt "$1"
+    fi
+  '';
+}