gistfile1.txt

❯ nix show-derivation /nix/store/gmk7lgll19mwb2d6f6n385pqpaf5yy6a-m4-1.4.18.tar.xz.drv
warning: unknown setting 'experimental-features'
{
  "/nix/store/gmk7lgll19mwb2d6f6n385pqpaf5yy6a-m4-1.4.18.tar.xz.drv": {
    "outputs": {
      "out": {
        "path": "/nix/store/fni1i01khaambp44gr99r7461y1hn7hw-m4-1.4.18.tar.xz",
        "hashAlgo": "sha256",
        "hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
      }
    },
    "inputSrcs": [],
    "inputDrvs": {},
    "platform": "builtin",
    "builder": "builtin:fetchurl",
    "args": [],
    "env": {
      "builder": "builtin:fetchurl",
      "executable": "",
      "name": "m4-1.4.18.tar.xz",
      "out": "/nix/store/fni1i01khaambp44gr99r7461y1hn7hw-m4-1.4.18.tar.xz",
      "outputHash": "0mdqa9w1p6cmli6976v4wi0sw9r4p5prkj7lzfd1877wk11c9c73",
      "outputHashAlgo": "sha256",
      "outputHashMode": "flat",
      "outputs": "out",
      "preferLocalBuild": "1",
      "system": "builtin",
      "url": "ftp://ftp.gnu.org/gnu/m4/m4-1.4.18.tar.xz"
    }
  }
}