switch to Nix flakes

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1633613384,
+        "narHash": "sha256-Bn4Jr0vz8kjsKLoqI6THehlt8bpfGnrVxVyBMB8ql94=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "710be10957913238d3f57b598387efba68aa41b8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "master",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,45 @@
+{
+  description = "The third-generation ARTIQ compiler";
+
+  inputs.nixpkgs.url = github:NixOS/nixpkgs/master;
+
+  outputs = { self, nixpkgs }:
+    let
+      pkgs = import nixpkgs { system = "x86_64-linux"; };
+    in {
+      packages.x86_64-linux = {
+        nac3artiq = pkgs.python3Packages.toPythonModule (
+          pkgs.rustPlatform.buildRustPackage {
+            name = "nac3artiq";
+            src = self;
+            cargoSha256 = "0cml3irmc72f42dqmka9w4l3k397b2rnns768vm132mh2zyv85lp";
+            nativeBuildInputs = [ pkgs.python3 pkgs.llvm_11 ];
+            buildInputs = [ pkgs.python3 pkgs.libffi pkgs.libxml2 pkgs.llvm_11 ];
+            cargoBuildFlags = [ "--package" "nac3artiq" ];
+            cargoTestFlags = [ "--package" "nac3core" "--package" "nac3artiq" ];
+            installPhase =
+              ''
+              TARGET_DIR=$out/${pkgs.python3Packages.python.sitePackages}
+              mkdir -p $TARGET_DIR
+              cp target/x86_64-unknown-linux-gnu/release/libnac3artiq.so $TARGET_DIR/nac3artiq.so
+              '';
+          }
+        );
+      };
+
+      devShell.x86_64-linux = pkgs.mkShell {
+        name = "nac3-dev-shell";
+        buildInputs = with pkgs; [
+          llvm_11
+          clang_11
+          lld_11
+          cargo
+          rustc
+          libffi
+          libxml2
+          clippy
+          (python3.withPackages(ps: [ ps.numpy ]))
+        ];
+      };
+  };
+}

shell.nix

@@ -1,17 +0,0 @@
-let
-  pkgs = import <nixpkgs> { };
-in
-  pkgs.stdenv.mkDerivation {
-    name = "nac3-env";
-    buildInputs = with pkgs; [
-      llvm_11
-      clang_11
-      lld_11
-      cargo
-      rustc
-      libffi
-      libxml2
-      clippy
-      (python3.withPackages(ps: [ps.numpy]))
-    ];
-  }