And from flake.lock

    "colmena": {
      "inputs": {
        "flake-compat": "flake-compat",
        "nixpkgs": "nixpkgs",
        "utils": "utils"
      },
      "locked": {
        "lastModified": 1630033162,
        "narHash": "sha256-1Vh0d2t2aSfvEXx1iQ1TRNpFfncTE3G+T0Co+dRppBo=",
        "owner": "zhaofengli",
        "repo": "colmena",
        "rev": "37b43cd6d7f924e6eb7eaa7b17852d813cf96c31",
        "type": "github"
      },
      "original": {
        "owner": "zhaofengli",
        "repo": "colmena",
        "type": "github"
      }