Build against Nix 2.5.1

flake.lock

@@ -3,16 +3,15 @@
     "lowdown-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1617481909,
-        "narHash": "sha256-SqnfOFuLuVRRNeVJr1yeEPJue/qWoCp5N6o5Kr///p4=",
+        "lastModified": 1633514407,
+        "narHash": "sha256-Dw32tiMjdK9t3ETl5fzGrutQTzh2rufgZV4A/BbxuD4=",
         "owner": "kristapsdz",
         "repo": "lowdown",
-        "rev": "148f9b2f586c41b7e36e73009db43ea68c7a1a4d",
+        "rev": "d2c2b44ff6c27b936ec27358a2653caaef8f73b8",
         "type": "github"
       },
       "original": {
         "owner": "kristapsdz",
-        "ref": "VERSION_0_8_4",
         "repo": "lowdown",
         "type": "github"
       }
@@ -23,25 +22,27 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1628586117,
-        "narHash": "sha256-8hS4xy7fq3z9XZIMYm4sQi9SzhcYqEJfdbwgDePoWuc=",
+        "lastModified": 1639739069,
+        "narHash": "sha256-GOsiqy9EaTwDn2PLZ4eFj1VkXcBUbqrqHehRE9GuGdU=",
         "owner": "NixOS",
         "repo": "nix",
-        "rev": "a6ba313a0aac3b6e2fef434cb42d190a0849238e",
+        "rev": "b4f250417ab64f237c8b51439fe1f427193ab23b",
         "type": "github"
       },
       "original": {
-        "id": "nix",
-        "type": "indirect"
+        "owner": "NixOS",
+        "ref": "2.5.1",
+        "repo": "nix",
+        "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1624862269,
-        "narHash": "sha256-JFcsh2+7QtfKdJFoPibLFPLgIW6Ycnv8Bts9a7RYme0=",
+        "lastModified": 1632864508,
+        "narHash": "sha256-d127FIvGR41XbVRDPVvozUPQ/uRHbHwvfyKHwEt5xFM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f77036342e2b690c61c97202bf48f2ce13acc022",
+        "rev": "82891b5e2c2359d7e58d08849e4c89511ab94234",
         "type": "github"
       },
       "original": {

flake.nix

@@ -2,6 +2,7 @@
   description = "A Nix-based continuous build system";
 
   inputs.nixpkgs.follows = "nix/nixpkgs";
+  inputs.nix.url = "github:NixOS/nix/2.5.1";
 
   outputs = { self, nixpkgs, nix }:
     let