diff --git a/lib/mkFlake/default.nix b/lib/mkFlake/default.nix
index 37d055f..4ff3cd4 100644
--- a/lib/mkFlake/default.nix
+++ b/lib/mkFlake/default.nix
@@ -8,7 +8,7 @@ in
 { self, ... } @ args:
 let
 
-  cfg = (lib.evalFlakeArgs { inherit args; }).config;
+  cfg = (evalFlakeArgs { inherit args; }).config;
 
   multiPkgs = os.mkPkgs { inherit (cfg) extern overrides; };
 
diff --git a/lib/mkFlake/evalArgs.nix b/lib/mkFlake/evalArgs.nix
new file mode 100644
index 0000000..8e4f14d
--- /dev/null
+++ b/lib/mkFlake/evalArgs.nix
@@ -0,0 +1,151 @@
+{ self, dev, nixos, inputs, ... }:
+
+{ args }:
+let
+  argOpts = with nixos.lib; { config, options, ... }:
+    let
+      inherit (dev) os;
+
+      inherit (config) self;
+
+      inputAttrs = with types; functionTo attrs;
+      moduleType = with types; anything // {
+        inherit (submodule {}) check;
+        description = "valid module";
+      };
+    in
+    {
+      options = with types; {
+        self = mkOption {
+          type = addCheck attrs nixos.lib.isStorePath;
+          description = "The flake to create the devos outputs for";
+        };
+        hosts = mkOption {
+          type = path;
+          default = "${self}/hosts";
+          defaultText = "\${self}/hosts";
+          apply = toString;
+          description = ''
+            Path to directory containing host configurations that will be exported
+            to the 'nixosConfigurations' output.
+          '';
+        };
+        packages = mkOption {
+          # functionTo changes arg names which breaks flake check
+          type = types.anything // {
+            check = builtins.isFunction;
+            description = "Nixpkgs overlay";
+          };
+          default = (final: prev: {});
+          defaultText = "(final: prev: {})";
+          description = ''
+            Overlay for custom packages that will be included in treewide 'pkgs'.
+            This should follow the standard nixpkgs overlay format - two argument function
+            that returns an attrset.
+            These packages will be exported to the 'packages' and 'legacyPackages' outputs.
+          '';
+        };
+        modules = mkOption {
+          type = listOf moduleType;
+          default = [];
+          apply = dev.pathsToImportedAttrs;
+          description = ''
+            list of modules to include in confgurations and export in 'nixosModules' output
+          '';
+        };
+        userModules = mkOption {
+          type = listOf moduleType;
+          default = [];
+          apply = dev.pathsToImportedAttrs;
+          description = ''
+            list of modules to include in home-manager configurations and export in
+            'homeModules' output
+          '';
+        };
+        profiles = mkOption {
+          type = path;
+          default = "${self}/profiles";
+          defaultText = "\${self}/profiles";
+          apply = x: os.mkProfileAttrs (toString x);
+          description = "path to profiles folder that can be collected into suites";
+        };
+        userProfiles = mkOption {
+          type = path;
+          default = "${self}/users/profiles";
+          defaultText = "\${self}/users/profiles";
+          apply = x: os.mkProfileAttrs (toString x);
+          description = "path to user profiles folder that can be collected into userSuites";
+        };
+        suites =
+          let
+            defaults = { user = {}; system = {}; };
+          in
+          mkOption {
+            type = inputAttrs;
+            default = { ... }: defaults;
+            defaultText = "{ user = {}; system = {}; }";
+            apply = suites: defaults // os.mkSuites {
+              inherit suites;
+              inherit (config) profiles users userProfiles;
+            };
+            description = ''
+              Function with inputs 'users' and 'profiles' that returns attribute set
+              with user and system suites. The former for Home Manager and the latter
+              for nixos configurations.
+              These can be accessed through the 'suites' specialArg in each config system.
+            '';
+          };
+        users = mkOption {
+          type = path;
+          default = "${self}/users";
+          defaultText = "\${self}/users";
+          apply = x: os.mkProfileAttrs (toString x);
+          description = ''
+            path to folder containing profiles that define system users
+          '';
+        };
+        extern =
+          let
+            defaults = {
+              modules = []; overlays = []; specialArgs = {};
+              userModules = []; userSpecialArgs = [];
+            };
+          in
+          mkOption {
+            type = inputAttrs;
+            default = { ... }: defaults;
+            defaultText = ''
+              { modules = []; overlays = []; specialArgs = []; userModules = []; userSpecialArgs = []; }
+            '';
+            # So unneeded extern attributes can safely be deleted
+            apply = x: defaults // (x { inputs = inputs // self.inputs; });
+            description = ''
+              Function with argument 'inputs' that contains all devos and ''${self}'s inputs.
+              The function should return an attribute set with modules, overlays, and
+              specialArgs to be included across nixos and home manager configurations.
+              Only attributes that are used should be returned.
+            '';
+          };
+        overlays = mkOption {
+          type = path;
+          default = "${self}/overlays";
+          defaultText = "\${self}/overlays";
+          apply = x: dev.pathsToImportedAttrs (dev.pathsIn (toString x));
+          description = ''
+            path to folder containing overlays which will be applied to pkgs and exported in
+            the 'overlays' output
+          '';
+        };
+        overrides = mkOption rec {
+          type = attrs;
+          default = { modules = []; disabledModules = []; packages = _: _: _: {}; };
+          defaultText = "{ modules = []; disabledModules = []; packages = {}; }";
+          apply = x: default // x;
+          description = "attrset of packages and modules that will be pulled from nixpkgs master";
+        };
+      };
+    };
+in
+  nixos.lib.evalModules {
+    modules = [ argOpts args ];
+  }