flake.nix: switch nixpkgs from nixos-24.11 to nixos-unstable

NixOS 24.11 doesn't provide go-1.24 which is now required for this
project.

Additionally fix the `CGO_ENABLED` warnings that comes with the newer
nixpkgs version.

flake.lock

···
     "inter-fonts-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1731680160,
+        "lastModified": 1731705360,
         "narHash": "sha256-5vdKKvHAeZi6igrfpbOdhZlDX2/5+UvzlnCQV6DdqoQ=",
         "type": "tarball",
         "url": "https://github.com/rsms/inter/releases/download/v4.1/Inter-4.1.zip"
···
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1746055187,
-        "narHash": "sha256-3dqArYSMP9hM7Qpy5YWhnSjiqniSaT2uc5h2Po7tmg0=",
+        "lastModified": 1746663147,
+        "narHash": "sha256-Ua0drDHawlzNqJnclTJGf87dBmaO/tn7iZ+TCkTRpRc=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "3e362ce63e16b9572d8c2297c04f7c19ab6725a5",
+        "rev": "dda3dcd3fe03e991015e9a74b22d35950f264a54",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-24.11",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

···
   description = "atproto github";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     indigo = {
       url = "github:oppiliappan/indigo";
       flake = false;
···
     inherit (gitignore.lib) gitignoreSource;
   in {
     overlays.default = final: prev: let
-      goModHash = "sha256-CmBuvv3duQQoc8iTW4244w1rYLGeqMQS+qQ3wwReZZg=";
+      goModHash = "sha256-zcfTNo7QsiihzLa4qHEX8uGGtbcmBn8TlSm0YHBRNw8=";
       buildCmdPackage = name:
         final.buildGoModule {
           pname = name;
···
           src = gitignoreSource ./.;
           subPackages = ["cmd/${name}"];
           vendorHash = goModHash;
-          CGO_ENABLED = 0;
+          env.CGO_ENABLED = 0;
         };
     in {
       indigo-lexgen = final.buildGoModule {
···
           doCheck = false;
           subPackages = ["cmd/appview"];
           vendorHash = goModHash;
-          CGO_ENABLED = 1;
+          env.CGO_ENABLED = 1;
           stdenv = pkgsStatic.stdenv;
         };
 
···
 
             runHook postInstall
           '';
-          CGO_ENABLED = 1;
+          env.CGO_ENABLED = 1;
         };
       knotserver-unwrapped = final.pkgsStatic.buildGoModule {
         pname = "knotserver";
···
         src = gitignoreSource ./.;
         subPackages = ["cmd/knotserver"];
         vendorHash = goModHash;
-        CGO_ENABLED = 1;
+        env.CGO_ENABLED = 1;
       };
       repoguard = buildCmdPackage "repoguard";
       keyfetch = buildCmdPackage "keyfetch";
···
           cp -f ${inter-fonts-src}/web/InterDisplay*.woff2 appview/pages/static/fonts/
           cp -f ${ibm-plex-mono-src}/fonts/complete/woff2/IBMPlexMono-Regular.woff2 appview/pages/static/fonts/
         '';
-        CGO_ENABLED=1;
+        env.CGO_ENABLED = 1;
       };
     });
     apps = forAllSystems (system: let
···
     };
   };
 }
-