Use flake-utils-plus

flake.lock

@@ -31,6 +31,21 @@
         "type": "github"
       }
     },
+    "flake-utils_2": {
+      "locked": {
+        "lastModified": 1618217525,
+        "narHash": "sha256-WGrhVczjXTiswQaoxQ+0PTfbLNeOQM6M36zvLn78AYg=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c6169a2772643c4a93a0b5ac1c61e296cba68544",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "neovim-flake": {
       "inputs": {
         "flake-utils": "flake-utils",
@@ -95,7 +110,26 @@
     "root": {
       "inputs": {
         "neovim-overlay": "neovim-overlay",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "utils": "utils"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "flake-utils": "flake-utils_2"
+      },
+      "locked": {
+        "lastModified": 1619358717,
+        "narHash": "sha256-FkEOIW82ClvUBtD8aqPediM8FERldsOyjPIyapVa65I=",
+        "owner": "gytis-ivaskevicius",
+        "repo": "flake-utils-plus",
+        "rev": "e7ae270a23695b50fbb6b72759a7fb1e3340ca86",
+        "type": "github"
+      },
+      "original": {
+        "owner": "gytis-ivaskevicius",
+        "repo": "flake-utils-plus",
+        "type": "github"
       }
     }
   },

flake.nix

@@ -2,22 +2,33 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
 
-    neovim-overlay.url = "github:nix-community/neovim-nightly-overlay";
-    neovim-overlay.inputs.nixpkgs.follows = "nixpkgs";
-  };
+    utils.url = "github:gytis-ivaskevicius/flake-utils-plus";
 
-  outputs = { self, nixpkgs, neovim-overlay, ... }: {
-    nixosConfigurations = let
-      neovimOverlay = { pkgs, ... }: { nixpkgs.overlays = [ neovim-overlay.overlay ]; };
-    in {
-      petalius = nixpkgs.lib.nixosSystem {
-        system = "x86_64-linux";
-        modules = [ ./petalius.nix neovimOverlay ];
-      };
-      flammea = nixpkgs.lib.nixosSystem {
-        system = "x86_64-linux";
-        modules = [ ./flammea.nix neovimOverlay ];
-      };
+    neovim-overlay = {
+      url = "github:nix-community/neovim-nightly-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
     };
   };
+
+  outputs = inputs@{ self, nixpkgs, neovim-overlay, utils, ... }: utils.lib.systemFlake {
+    inherit self inputs;
+
+    sharedOverlays = [
+      neovim-overlay.overlay
+    ];
+
+    channels.nixpkgs.input = nixpkgs;
+
+    hostDefaults = {
+      modules = [
+        utils.nixosModules.saneFlakeDefaults
+      ];
+    };
+
+    hosts = {
+      petalius.modules = [ ./petalius.nix ];
+      flammea.modules = [ ./flammea.nix ];
+    };
+
+  };
 }

flammea.nix

@@ -13,7 +13,6 @@
       ./atmega.nix
       ./v4l2loopback.nix
       ./huion.nix
-      ./unstable-nix.nix
       ./spacenav.nix
     ];
 

petalius.nix

@@ -12,7 +12,6 @@
       ./atmega.nix
       ./v4l2loopback.nix
       ./huion.nix
-      ./unstable-nix.nix
     ];
 
   hardware.enableRedistributableFirmware = true;