restore old files now!

package.nix

@@ -1,38 +1,65 @@
 {
 	lib,
-	stdenvNoCC,
+	clangStdenv,
 	callPackage,
 	linkFarm,
+	rustHooks,
+	rustPackages,
+	versionCheckHook,
+}: lib.callWith' rustPackages ({
+	rustPlatform,
+	cargo,
 }: let
-	stdenv = stdenvNoCC;
+	stdenv = clangStdenv;
+	cargoToml = lib.importTOML ./Cargo.toml;
+	cargoPackage = cargoToml.package;
 in stdenv.mkDerivation (finalAttrs: let
 	self = finalAttrs.finalPackage;
 in {
-	name = "dynix-modules";
+	pname = cargoPackage.name;
+	version = cargoPackage.version;
 
 	strictDeps = true;
 	__structuredAttrs = true;
 
 	outputs = [ "out" "modules" ];
 
-	src = lib.fileset.toSource {
+	doCheck = true;
+	doInstallCheck = true;
+
+	modulesSrc = lib.fileset.toSource {
 		root = ./modules/dynamicism;
 		fileset = lib.fileset.unions [
 			./modules/dynamicism
 		];
 	};
 
-	phases = [ "unpackPhase" "patchPhase" "installPhase" ];
+	src = lib.fileset.toSource {
+		root = ./.;
+		fileset = lib.fileset.unions [
+			./Cargo.toml
+			./Cargo.lock
+			./src
+		];
+	};
+
+	cargoDeps = rustPlatform.importCargoLock {
+		lockFile = ./Cargo.lock;
+	};
+
+	nativeBuildInputs = rustHooks.asList ++ [
+		cargo
+	];
+
+	nativeInstallCheckInputs = [
+		versionCheckHook
+	];
 
 	modulesOut = "${placeholder "modules"}/share/nixos/modules/dynix";
 
-	installPhase = lib.dedent ''
-		runHook preInstall
-		mkdir -p "$out"
-		cp -r * "$out/"
-
-		mkdir -p "$modules/share/nixos/modules/dynix"
-		cp --reflink=auto -r "$out/"* "$modulesOut/"
+	postInstall = lib.dedent ''
+		mkdir -p "$modulesOut"
+		cp -r "$modulesSrc/"* "$modulesOut/"
 	'';
 
 	passthru.mkDevShell = {
@@ -46,7 +73,12 @@ in {
 		]);
 	in mkShell' {
 		name = "devshell-for-${self.name}";
-		packages = [ pyEnv ];
+		inputsFrom = [ self ];
+		packages = [
+			pyEnv
+			rustPackages.rustc
+			rustPackages.rustfmt
+		];
 		env.PYTHONPATH = [
 			"${pyEnv}/${pyEnv.sitePackages}"
 			# Cursed.
@@ -55,6 +87,7 @@ in {
 	};
 
 	passthru.modulesPath = self.modules + "/share/nixos/modules";
+	passthru.dynix = self.modulesPath + "/dynix";
 
 	passthru.tests = lib.fix (callPackage ./tests {
 		dynix = self;
@@ -67,6 +100,7 @@ in {
 			Default output contains the modules at top-level, meant for `import`.
 			The `modules` output contains the modules prefixed under `/share/nixos/modules/dynix`.
 		'';
-		outputsToInstall = [ "modules" ];
+		mainProgram = "dynix";
+		outputsToInstall = [ "out" "modules" ];
 	};
-})
+}))