diff --git a/all-modules.nix b/all-modules.nix
index 83d2bd0..0a9f38e 100644
--- a/all-modules.nix
+++ b/all-modules.nix
@@ -1,4 +1,3 @@
-{ lib, ... }:
 {
   imports = [
     ./modules/apps.nix
diff --git a/dev/flake-module.nix b/dev/flake-module.nix
index fa77f15..5ac60b9 100644
--- a/dev/flake-module.nix
+++ b/dev/flake-module.nix
@@ -13,7 +13,7 @@
     when.dayOfMonth = 1;
   };
 
-  perSystem = { config, self', inputs', pkgs, ... }: {
+  perSystem = { config, pkgs, ... }: {
 
     devShells.default = pkgs.mkShell {
       nativeBuildInputs = [
@@ -42,7 +42,7 @@
     # for repl exploration / debug
     config.config = config;
     options.mySystem = lib.mkOption { default = config.allSystems.${builtins.currentSystem}; };
-    config.effects = withSystem "x86_64-linux" ({ config, pkgs, hci-effects, ... }: {
+    config.effects = withSystem "x86_64-linux" ({ pkgs, hci-effects, ... }: {
       tests = {
         template = pkgs.callPackage ./tests/template.nix { inherit hci-effects; };
       };
diff --git a/dev/flake.nix b/dev/flake.nix
index b0af470..e6fc8e5 100644
--- a/dev/flake.nix
+++ b/dev/flake.nix
@@ -12,7 +12,7 @@
     hercules-ci-effects.url = "github:hercules-ci/hercules-ci-effects";
   };
 
-  outputs = { self, ... }:
+  outputs = { ... }:
     {
       # The dev tooling is in ./flake-module.nix
       # See comment at `inputs` above.
diff --git a/extras/easyOverlay.nix b/extras/easyOverlay.nix
index a29c890..679afd1 100644
--- a/extras/easyOverlay.nix
+++ b/extras/easyOverlay.nix
@@ -1,4 +1,4 @@
-toplevel@{ config, lib, flake-parts-lib, getSystemIgnoreWarning, ... }:
+toplevel@{ lib, flake-parts-lib, getSystemIgnoreWarning, ... }:
 let
   inherit (flake-parts-lib)
     mkPerSystemOption;
@@ -37,7 +37,7 @@ in
         };
       };
       config = {
-        _module.args.final = lib.mkDefault (pkgs.extend (toplevel.config.flake.overlays.default));
+        _module.args.final = lib.mkDefault (pkgs.extend toplevel.config.flake.overlays.default);
       };
     });
   };
diff --git a/extras/flakeModules.nix b/extras/flakeModules.nix
index 6468dcb..4da738e 100644
--- a/extras/flakeModules.nix
+++ b/extras/flakeModules.nix
@@ -1,10 +1,8 @@
-{ config, self, lib, flake-parts-lib, ... }:
+{ self, lib, flake-parts-lib, ... }:
 let
   inherit (lib)
-    filterAttrs
     mapAttrs
     mkOption
-    optionalAttrs
     types
     ;
   inherit (flake-parts-lib)
diff --git a/flake.nix b/flake.nix
index 5d1447b..190d8f2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,7 +5,7 @@
     nixpkgs-lib.url = "github:NixOS/nixpkgs/nixos-unstable?dir=lib";
   };
 
-  outputs = { self, nixpkgs-lib, ... }: {
+  outputs = { nixpkgs-lib, ... }: {
     lib = import ./lib.nix { inherit (nixpkgs-lib) lib; };
     templates = {
       default = {
diff --git a/lib.nix b/lib.nix
index ae588c8..f99f0cc 100644
--- a/lib.nix
+++ b/lib.nix
@@ -28,27 +28,6 @@ let
     then maybeFlake._type == "flake"
     else maybeFlake ? inputs && maybeFlake ? outputs && maybeFlake ? sourceInfo;
 
-  # Polyfill functionTo to make sure it has type merging.
-  # Remove 2022-12
-  functionTo =
-    let sample = types.functionTo lib.types.str;
-    in
-    if sample.functor.wrapped._type or null == "option-type"
-    then types.functionTo
-    else
-      elemType: lib.mkOptionType {
-        name = "functionTo";
-        description = "function that evaluates to a(n) ${elemType.description}";
-        check = lib.isFunction;
-        merge = loc: defs:
-          fnArgs: (lib.mergeDefinitions (loc ++ [ "[function body]" ]) elemType (map (fn: { inherit (fn) file; value = fn.value fnArgs; }) defs)).mergedValue;
-        getSubOptions = prefix: elemType.getSubOptions (prefix ++ [ "[function body]" ]);
-        getSubModules = elemType.getSubModules;
-        substSubModules = m: functionTo (elemType.substSubModules m);
-        functor = (lib.defaultFunctor "functionTo") // { type = functionTo; wrapped = elemType; };
-        nestedTypes.elemType = elemType;
-      };
-
   # Polyfill https://github.com/NixOS/nixpkgs/pull/163617
   deferredModuleWith = lib.deferredModuleWith or (
     attrs@{ staticModules ? [ ] }: mkOptionType {
@@ -216,7 +195,7 @@ let
           } // optionalAttrs (toType != null) {
           type = toType;
         });
-        config = (mkAliasAndWrapDefsWithPriority (setAttrByPath to) fromOpt);
+        config = mkAliasAndWrapDefsWithPriority (setAttrByPath to) fromOpt;
       };
 
     # Helper function for importing while preserving module location. To be added
diff --git a/modules/apps.nix b/modules/apps.nix
index dcd5b09..0fd5d7c 100644
--- a/modules/apps.nix
+++ b/modules/apps.nix
@@ -1,4 +1,4 @@
-{ config, lib, flake-parts-lib, ... }:
+{ lib, flake-parts-lib, ... }:
 let
   inherit (lib)
     mkOption
@@ -17,11 +17,6 @@ let
   getExe = x:
     "${lib.getBin x}/bin/${x.meta.mainProgram or (throw ''Package ${x.name or ""} does not have meta.mainProgram set, so I don't know how to find the main executable. You can set meta.mainProgram, or pass the full path to executable, e.g. program = "''${pkg}/bin/foo"'')}";
 
-  getBin = x:
-    if !x?outputSpecified || !x.outputSpecified
-    then x.bin or x.out or x
-    else x;
-
   appType = lib.types.submodule {
     options = {
       type = mkOption {
diff --git a/modules/checks.nix b/modules/checks.nix
index d849c65..9e7ceae 100644
--- a/modules/checks.nix
+++ b/modules/checks.nix
@@ -1,4 +1,4 @@
-{ config, lib, flake-parts-lib, ... }:
+{ lib, flake-parts-lib, ... }:
 let
   inherit (lib)
     mkOption
diff --git a/modules/debug.nix b/modules/debug.nix
index 6436010..995f13b 100644
--- a/modules/debug.nix
+++ b/modules/debug.nix
@@ -10,9 +10,6 @@ let
   inherit (flake-parts-lib)
     mkPerSystemOption
     ;
-  inherit (builtins)
-    removeAttrs
-    ;
 
   mkDebugConfig = { config, options, extendModules }: config // {
     inherit config;
diff --git a/modules/devShells.nix b/modules/devShells.nix
index 6521fa8..d14e59e 100644
--- a/modules/devShells.nix
+++ b/modules/devShells.nix
@@ -1,4 +1,4 @@
-{ config, lib, flake-parts-lib, ... }:
+{ lib, flake-parts-lib, ... }:
 let
   inherit (lib)
     mkOption
diff --git a/modules/flake.nix b/modules/flake.nix
index 884b2de..012a6c9 100644
--- a/modules/flake.nix
+++ b/modules/flake.nix
@@ -1,10 +1,7 @@
-{ config, lib, ... }:
+{ lib, ... }:
 let
   inherit (lib)
-    filterAttrs
-    mapAttrs
     mkOption
-    optionalAttrs
     types
     ;
 in
diff --git a/modules/formatter.nix b/modules/formatter.nix
index 975e664..838b7cf 100644
--- a/modules/formatter.nix
+++ b/modules/formatter.nix
@@ -24,7 +24,7 @@ in
       };
     };
 
-    perSystem = mkPerSystemOption ({ config, ... }: {
+    perSystem = mkPerSystemOption {
       _file = ./formatter.nix;
       options = {
         formatter = mkOption {
@@ -35,7 +35,7 @@ in
           '';
         };
       };
-    });
+    };
   };
   config = {
     flake.formatter =
diff --git a/modules/legacyPackages.nix b/modules/legacyPackages.nix
index 36df4dd..fb17e14 100644
--- a/modules/legacyPackages.nix
+++ b/modules/legacyPackages.nix
@@ -1,4 +1,4 @@
-{ config, lib, flake-parts-lib, ... }:
+{ lib, flake-parts-lib, ... }:
 let
   inherit (lib)
     mkOption
diff --git a/modules/moduleWithSystem.nix b/modules/moduleWithSystem.nix
index 057399e..e5c7008 100644
--- a/modules/moduleWithSystem.nix
+++ b/modules/moduleWithSystem.nix
@@ -1,4 +1,4 @@
-{ config, lib, withSystem, ... }:
+{ withSystem, ... }:
 {
   config = {
     _module.args = {
diff --git a/modules/nixosConfigurations.nix b/modules/nixosConfigurations.nix
index c2ae8d6..7dc973b 100644
--- a/modules/nixosConfigurations.nix
+++ b/modules/nixosConfigurations.nix
@@ -1,4 +1,4 @@
-{ config, lib, flake-parts-lib, ... }:
+{ lib, flake-parts-lib, ... }:
 let
   inherit (lib)
     mkOption
diff --git a/modules/nixosModules.nix b/modules/nixosModules.nix
index 1d21f9e..34e205a 100644
--- a/modules/nixosModules.nix
+++ b/modules/nixosModules.nix
@@ -1,10 +1,8 @@
-{ config, self, lib, flake-parts-lib, ... }:
+{ self, lib, flake-parts-lib, ... }:
 let
   inherit (lib)
-    filterAttrs
     mapAttrs
     mkOption
-    optionalAttrs
     types
     ;
   inherit (flake-parts-lib)
diff --git a/modules/overlays.nix b/modules/overlays.nix
index 86fc457..a09e8f6 100644
--- a/modules/overlays.nix
+++ b/modules/overlays.nix
@@ -1,4 +1,4 @@
-{ config, lib, flake-parts-lib, ... }:
+{ lib, flake-parts-lib, ... }:
 let
   inherit (lib)
     mkOption
@@ -16,7 +16,7 @@ in
         # also update description when done
         type = types.lazyAttrsOf (types.uniq (types.functionTo (types.functionTo (types.lazyAttrsOf types.unspecified))));
         # This eta expansion exists for the sole purpose of making nix flake check happy.
-        apply = lib.mapAttrs (k: f: final: prev: f final prev);
+        apply = lib.mapAttrs (_k: f: final: prev: f final prev);
         default = { };
         example = lib.literalExpression or lib.literalExample ''
           {
diff --git a/modules/packages.nix b/modules/packages.nix
index dcb29eb..20f0071 100644
--- a/modules/packages.nix
+++ b/modules/packages.nix
@@ -1,4 +1,4 @@
-{ config, lib, flake-parts-lib, ... }:
+{ lib, flake-parts-lib, ... }:
 let
   inherit (lib)
     mkOption
diff --git a/modules/transposition.nix b/modules/transposition.nix
index 5ddfcd0..01ceb93 100644
--- a/modules/transposition.nix
+++ b/modules/transposition.nix
@@ -7,10 +7,6 @@ let
     mkOption
     types
     ;
-  inherit (flake-parts-lib)
-    mkSubmoduleOptions
-    mkPerSystemOption
-    ;
 
   transpositionModule = {
     options = {
@@ -70,7 +66,7 @@ in
           config.transposition
         );
 
-    perSystem = { ... }: {
+    perSystem = {
       options =
         mapAttrs
           (k: v: lib.mkOption { })
diff --git a/modules/withSystem.nix b/modules/withSystem.nix
index c6b0a16..161eece 100644
--- a/modules/withSystem.nix
+++ b/modules/withSystem.nix
@@ -1,8 +1,6 @@
-{ config, lib, flake-parts-lib, self, getSystem, ... }:
+{ lib, flake-parts-lib, getSystem, ... }:
 let
   inherit (lib)
-    genAttrs
-    mapAttrs
     mkOption
     types
     ;
@@ -12,7 +10,7 @@ let
 in
 {
   options = {
-    perSystem = mkPerSystemOption ({ config, options, system, specialArgs, ... }: {
+    perSystem = mkPerSystemOption ({ config, options, specialArgs, ... }: {
       _file = ./perSystem.nix;
       options = {
         allModuleArgs = mkOption {