Add nixos to circleci

.circleci/config.yml

@@ -102,6 +102,16 @@ jobs:
             make check
             cat test-suite.log
             make distcheck
+  nixos:
+    docker:
+      - image: docker.io/nixos/nix:latest
+    steps:
+      - checkout
+      - run:
+          name: Build
+          command: |
+            nix-channel --update
+            nix-build
   bigsur:
     macos:
       xcode: 12.5.1
@@ -154,4 +164,5 @@ workflows:
           matrix:
             parameters:
               distro: [fedora36, fedora37, centos8, centos9, debian11, ubuntu2204, archlinux, opensuse15]
+      - nixos
       - bigsur

default.nix

@@ -0,0 +1,24 @@
+with import <nixpkgs> {};
+
+stdenv.mkDerivation {
+  name = "lsof";
+  version = "1.0";
+
+  src = ./.;
+
+  postPatch = ''
+    patchShebangs .
+  '';
+
+  nativeBuildInputs = [
+    autoreconfHook
+    groff
+    pkg-config
+  ];
+
+  doCheck = true;
+  checkInputs = lib.optionals stdenv.isLinux [
+    util-linux
+    procps
+  ];
+}