ci: simplify

nix/clippy.nix

@@ -0,0 +1,39 @@
+{
+  cargo,
+  clippy,
+  clippy-sarif,
+  refraction,
+  rustPlatform,
+  sarif-fmt,
+  stdenv,
+}:
+
+stdenv.mkDerivation {
+  pname = "${refraction.pname}-sarif-report";
+  inherit (refraction)
+    version
+    src
+    cargoDeps
+    buildInputs
+    ;
+
+  nativeBuildInputs = [
+    cargo
+    clippy
+    clippy-sarif
+    rustPlatform.cargoSetupHook
+    sarif-fmt
+  ];
+
+  buildPhase = ''
+    cargo clippy \
+      --all-features \
+      --all-targets \
+      --tests \
+      --message-format=json \
+    | clippy-sarif | tee $out | sarif-fmt
+  '';
+
+  dontInstall = true;
+  dontFixup = true;
+}