Use nixos-unstable nixVersions.stable as nix package

flake.lock

@@ -164,57 +164,6 @@
         "type": "github"
       }
     },
-    "lowdown-src": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1633514407,
-        "narHash": "sha256-Dw32tiMjdK9t3ETl5fzGrutQTzh2rufgZV4A/BbxuD4=",
-        "owner": "kristapsdz",
-        "repo": "lowdown",
-        "rev": "d2c2b44ff6c27b936ec27358a2653caaef8f73b8",
-        "type": "github"
-      },
-      "original": {
-        "owner": "kristapsdz",
-        "repo": "lowdown",
-        "type": "github"
-      }
-    },
-    "nix": {
-      "inputs": {
-        "lowdown-src": "lowdown-src",
-        "nixpkgs": "nixpkgs",
-        "nixpkgs-regression": "nixpkgs-regression"
-      },
-      "locked": {
-        "lastModified": 1643066034,
-        "narHash": "sha256-xEPeMcNJVOeZtoN+d+aRwolpW8mFSEQx76HTRdlhPhg=",
-        "owner": "NixOS",
-        "repo": "nix",
-        "rev": "a1cd7e58606a41fcf62bf8637804cf8306f17f62",
-        "type": "github"
-      },
-      "original": {
-        "id": "nix",
-        "ref": "latest-release",
-        "type": "indirect"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1632864508,
-        "narHash": "sha256-d127FIvGR41XbVRDPVvozUPQ/uRHbHwvfyKHwEt5xFM=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "82891b5e2c2359d7e58d08849e4c89511ab94234",
-        "type": "github"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "ref": "nixos-21.05-small",
-        "type": "indirect"
-      }
-    },
     "nixpkgs-master": {
       "locked": {
         "lastModified": 1644486793,
@@ -244,21 +193,6 @@
         "type": "github"
       }
     },
-    "nixpkgs-regression": {
-      "locked": {
-        "lastModified": 1643052045,
-        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
-        "type": "github"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
-        "type": "indirect"
-      }
-    },
     "nixpkgs-stable": {
       "locked": {
         "lastModified": 1644472683,
@@ -298,7 +232,6 @@
         "home-manager-stable": "home-manager-stable",
         "home-manager-unstable": "home-manager-unstable",
         "impermanence": "impermanence",
-        "nix": "nix",
         "nixpkgs-master": "nixpkgs-master",
         "nixpkgs-mine": "nixpkgs-mine",
         "nixpkgs-stable": "nixpkgs-stable",