update flake using flake-utils-plus

flake.lock

@@ -1,22 +1,57 @@
 {
   "nodes": {
-    "nixpkgs": {
+    "flake-utils": {
       "locked": {
-        "lastModified": 1632753066,
+        "lastModified": 1644229661,
-        "narHash": "sha256-oLs+Jm9zSRUVhTzPzKbQByLPor4IxdhZ6xUThAE1+s0=",
+        "narHash": "sha256-1YdnJAsNy69bpcjuoKdOYQX0YxZBiCYZo4Twxerqv7k=",
-        "owner": "NixOS",
+        "owner": "numtide",
-        "repo": "nixpkgs",
+        "repo": "flake-utils",
-        "rev": "1224e4bec7b8019f8847dd268a642000073bcfa3",
+        "rev": "3cecb5b042f7f209c56ffd8371b2711a290ec797",
         "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
+        "owner": "numtide",
-        "ref": "release-21.05",
+        "repo": "flake-utils",
-        "type": "indirect"
+        "type": "github"
+      }
+    },
+    "flake-utils-plus": {
+      "inputs": {
+        "flake-utils": "flake-utils"
+      },
+      "locked": {
+        "lastModified": 1657226504,
+        "narHash": "sha256-GIYNjuq4mJlFgqKsZ+YrgzWm0IpA4axA3MCrdKYj7gs=",
+        "owner": "gytis-ivaskevicius",
+        "repo": "flake-utils-plus",
+        "rev": "2bf0f91643c2e5ae38c1b26893ac2927ac9bd82a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "gytis-ivaskevicius",
+        "repo": "flake-utils-plus",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1665466769,
+        "narHash": "sha256-L+qcHpb4Ac3PipMXJY/Ktbu1+KXy23WCZ8pXWmsf7zY=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "0b20bf89e0035b6d62ad58f9db8fdbc99c2b01e8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "release-22.05",
+        "repo": "nixpkgs",
+        "type": "github"
       }
     },
     "root": {
       "inputs": {
+        "flake-utils-plus": "flake-utils-plus",
         "nixpkgs": "nixpkgs"
       }
     }

flake.nix

@@ -1,56 +1,53 @@
 {
   description = "Base16-template builder for nix.";
 
-  inputs.nixpkgs.url = "nixpkgs/release-21.05";
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/release-22.05";
+    flake-utils-plus.url = "github:gytis-ivaskevicius/flake-utils-plus";
+  };
+
+  outputs = { self, nixpkgs, flake-utils-plus }@inputs:
+    flake-utils-plus.lib.mkFlake rec {
+      inherit self inputs;
+      supportedSystems = [
+        "x86_64-linux" "aarch64-linux"
+        "x86_64-darwin" "aarch64-darwin"
+      ];
+
+      channels.stable.input = nixpkgs;
+
+      outputsBuilder = channels: let
+        pkgs = channels.stable;
+      in rec {
+        packages.update-base16 = let
+          binPath = with pkgs; lib.makeBinPath [ curl nix-prefetch-git gnused jq ];
+        in pkgs.writeShellScriptBin "update-base16" ''
+          PATH="$PATH:${binPath}"
+          generate_sources () {
+            out=$1
+            curl "https://raw.githubusercontent.com/chriskempson/base16-$out-source/master/list.yaml"\
+            | sed -nE "s~^([-_[:alnum:]]+): *(.*)~\1 \2~p"\
+            | while read name src; do
+                echo "{\"key\":\"$name\",\"value\":"
+                nix-prefetch-git $src
+                echo "}"
+              done\
+            | jq -s ".|del(.[].value.date)|from_entries"\
+            > $out.json
+          }
+          generate_sources templates &
+          generate_sources schemes &
+          wait
+        '';
+
+        defaultPackage = packages.update-base16;
+
+        devShell = pkgs.mkShell {
+          inputs = [ packages.update-base16 ];
+        };
+      };
 
-  outputs = { self, nixpkgs }@inputs:
-    with nixpkgs.legacyPackages."x86_64-linux"; rec {
       # Home-Manager Module
       hmModule = ./base16.nix;
-
-      packages.x86_64-linux.update-base16 = (let
-        mkScript = { name, file, env ? [ ] }:
-          writeTextFile {
-            name = "${name}";
-            executable = true;
-            destination = "/bin/${name}";
-            text = ''
-              for i in ${lib.concatStringsSep " " env}; do
-                export PATH="$i/bin:$PATH"
-              done
-              exec ${bash}/bin/bash ${file} $@
-            '';
-          };
-      in mkScript rec {
-        name = "update-base16";
-        env = [ curl nix-prefetch-git gnused jq ];
-        file = writeTextFile {
-          name = "${name}.sh";
-          executable = true;
-          text = ''
-            generate_sources () {
-              out=$1
-              curl "https://raw.githubusercontent.com/chriskempson/base16-$out-source/master/list.yaml"\
-              | sed -nE "s~^([-_[:alnum:]]+): *(.*)~\1 \2~p"\
-              | while read name src; do
-                  echo "{\"key\":\"$name\",\"value\":"
-                  nix-prefetch-git $src
-                  echo "}"
-                done\
-              | jq -s ".|del(.[].value.date)|from_entries"\
-              > $out.json
-            }
-            generate_sources templates &
-            generate_sources schemes &
-            wait
-          '';
-        };
-      });
-
-      defaultPackage.x86_64-linux = packages.x86_64-linux.update-base16;
-
-      devShell.x86_64-linux = mkShell {
-        buildInputs = [ packages.x86_64-linux.update-base16 ];
-      };
     };
 }