diff --git a/codecs/webp/flake.nix b/codecs/webp/flake.nix
index 89ba386ba..6d4c2aebd 100644
--- a/codecs/webp/flake.nix
+++ b/codecs/webp/flake.nix
@@ -15,7 +15,7 @@
       webp-src,
     }:
     let
-      optionSets = {
+      packageVariants = {
         base = {
           simd = false;
         };
@@ -28,10 +28,10 @@
       system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
-        packageBuilder =
-          with pkgs;
+        inherit (pkgs) lib stdenv runCommand emscripten writeShellScriptBin cmake;
+        packageVariantBuilder =
           name:
-          { simd }:
+          { simd }@variantOptions:
           {
             "webp-squoosh-${name}" = stdenv.mkDerivation {
               name = "webp-squoosh-${name}";
@@ -105,16 +105,18 @@
             '';
           };
 
-        forEachOption = pkgs.callPackage (import ../../nix/for-each-option.nix) { };
-        packageVariants = forEachOption packageBuilder optionSets;
+        packages = lib.foldl (acc: v: acc//v) {} (lib.mapAttrsToList packageVariantBuilder packageVariants);
+
+        joinLines = lines: lib.foldl (text: line: text + line) "" lines;
+
+        globalInstallerCode = joinLines (lib.lists.map (variantName: ''
+          ${self.packages.${system}."install-${variantName}"}/bin/install.sh
+        '') (lib.attrNames packageVariants));
       in
-      with pkgs;
+
       {
-        packages = packageVariants // {
-          installScript = writeShellScriptBin "install.sh" ''
-            ${self.packages.${system}.install-base}/bin/install.sh
-            ${self.packages.${system}.install-simd}/bin/install.sh
-          '';
+        packages = packages // {
+          installScript = writeShellScriptBin "install.sh" globalInstallerCode;
         };
         apps = {
           install = {
@@ -123,5 +125,6 @@
           };
         };
       }
+
     );
 }
diff --git a/nix/rust-helpers/default.nix b/nix/rust-helpers/default.nix
new file mode 100644
index 000000000..1fb69df53
--- /dev/null
+++ b/nix/rust-helpers/default.nix
@@ -0,0 +1,67 @@
+{
+  rustPlatform,
+  jq,
+  rsync,
+  stdenv,
+  fenix,
+}:
+{
+  buildRustPackage =
+    {
+      target,
+      src,
+      cargoLock ? {
+        lockFile = "${src}/Cargo.lock";
+      },
+      release ? true,
+      ...
+    }@args:
+    let
+      # Setup a toolchain for the the host system targeting `target`.
+      toolchain =
+        let
+          inherit (fenix) stable targets combine;
+        in
+        combine [
+          stable.rustc
+          stable.cargo
+          targets.${target}.stable.rust-std
+        ];
+
+      # Create `vendor` folder with all dependencies.
+      vendoredDependencies = rustPlatform.importCargoLock cargoLock;
+
+      rustcTargetDir = "target/${target}/${if release then "release" else "debug"}";
+    in
+    stdenv.mkDerivation (
+      (removeAttrs args [ "cargoLock" ])
+      // {
+        nativeBuildInputs = (args.nativeBuildInputs or [ ]) ++ [
+          toolchain
+          jq
+          rsync
+        ];
+        dontConfigure = true;
+        buildPhase = ''
+          runHook preBuild
+
+          cargo build \
+            --config 'source.crates-io.replace-with="vendored-sources"' \
+            --config 'source.vendored-sources.directory="${vendoredDependencies}"' \
+            --offline \
+            --target ${target} ${if release then "-r" else ""}
+
+          runHook postBuild
+        '';
+        installPhase = ''
+          runHook preInstall;
+          mkdir -p $out
+
+          find ${rustcTargetDir} -type f -maxdepth 1 | \
+            xargs -I ___X -n1 cp ___X $out
+
+          runHook postInstall;
+        '';
+      }
+    );
+}
diff --git a/nix/rust-helpers/flake.nix b/nix/rust-helpers/flake.nix
deleted file mode 100644
index bcb8474d6..000000000
--- a/nix/rust-helpers/flake.nix
+++ /dev/null
@@ -1,74 +0,0 @@
-{
-  inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/24.05";
-    fenix.url = "github:nix-community/fenix";
-  };
-  outputs =
-    {
-      self,
-      nixpkgs,
-      fenix,
-    }:
-    {
-      lib = {
-        buildRustPackage =
-          {
-            system,
-            target,
-            src,
-            cargoLock ? {
-              lockFile = "${src}/Cargo.lock";
-            },
-            release ? true,
-            ...
-          }@args:
-          with nixpkgs.legacyPackages.${system};
-          let
-            # Setup a toolchain for the the host system targeting `target`.
-            toolchain =
-              with fenix.packages.${system};
-              combine [
-                stable.rustc
-                stable.cargo
-                targets.${target}.stable.rust-std
-              ];
-
-            # Create `vendor` folder with all dependencies.
-            vendoredDependencies = rustPlatform.importCargoLock cargoLock;
-
-            rustcTargetDir = "target/${target}/${if release then "release" else "debug"}";
-          in
-          stdenv.mkDerivation (
-            (removeAttrs args [ "cargoLock" ])
-            // {
-              nativeBuildInputs = (args.nativeBuildInputs or [ ]) ++ [
-                toolchain
-                jq
-                rsync
-              ];
-              dontConfigure = true;
-              buildPhase = ''
-                runHook preBuild
-
-                cargo build \
-                  --config 'source.crates-io.replace-with="vendored-sources"' \
-                  --config 'source.vendored-sources.directory="${vendoredDependencies}"' \
-                  --offline \
-                  --target ${target} ${if release then "-r" else ""}
-
-                runHook postBuild
-              '';
-              installPhase = ''
-                runHook preInstall;
-                mkdir -p $out
-
-                find ${rustcTargetDir} -type f -maxdepth 1 | \
-                  xargs -I ___X -n1 cp ___X $out
-
-                runHook postInstall;
-              '';
-            }
-          );
-      };
-    };
-}
diff --git a/nix/squoosh-codec-builders/default.nix b/nix/squoosh-codec-builders/default.nix
new file mode 100644
index 000000000..7e63db73f
--- /dev/null
+++ b/nix/squoosh-codec-builders/default.nix
@@ -0,0 +1,51 @@
+{
+  fenix,
+  wasm-bindgen,
+  rust-helpers,
+  stdenv,
+}:
+{
+  buildSquooshCodecRust =
+    {
+      name,
+      src,
+      cargoLock ? {
+        lockFile = "${src}/Cargo.lock";
+      },
+      wasmBindgen ? {
+        sha256 = "";
+      },
+      ...
+    }@args:
+    let
+      codecBuild = rust-helpers.lib.buildRustPackage {
+        inherit src cargoLock;
+        name = "${name}-codec";
+        target = "wasm32-unknown-unknown";
+      };
+
+      wasm-bindgen-bin = wasm-bindgen.lib.buildFromCargoLock {
+        inherit cargoLock;
+        sha256 = wasmBindgen.sha256;
+      };
+    in
+    if wasmBindgen != null then
+      stdenv.mkDerivation (
+        (removeAttrs args [ "cargoLock" ])
+        // {
+          inherit codecBuild;
+          dontConfigure = true;
+          nativeBuildInputs = (args.nativeBuildInputs or [ ]) ++ [ wasm-bindgen-bin ];
+          buildPhase = ''
+            runHook preBuild
+
+            wasm-bindgen --target web --out-dir $out $codecBuild/*.wasm
+
+            runHook postBuild
+          '';
+          dontInstall = true;
+        }
+      )
+    else
+      codecBuild;
+}
diff --git a/nix/squoosh-codec-builders/flake.nix b/nix/squoosh-codec-builders/flake.nix
deleted file mode 100644
index 2ea89100b..000000000
--- a/nix/squoosh-codec-builders/flake.nix
+++ /dev/null
@@ -1,66 +0,0 @@
-{
-  inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/24.05";
-    fenix.url = "github:nix-community/fenix";
-    wasm-bindgen = {
-      url = "path:../wasm-bindgen";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
-    rust-helpers = {
-      url = "path:../rust-helpers";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
-  };
-  outputs =
-    {
-      self,
-      nixpkgs,
-      fenix,
-      wasm-bindgen,
-      rust-helpers,
-    }:
-    {
-      lib = {
-        buildSquooshCodecRust =
-          {
-            name,
-            system,
-            src,
-            cargoLock ? {
-              lockFile = "${src}/Cargo.lock";
-            },
-            wasmBindgenSha,
-            ...
-          }@args:
-          with nixpkgs.legacyPackages.${system};
-          let
-            wasm-bindgen-bin = wasm-bindgen.lib.buildFromCargoLock {
-              inherit system cargoLock;
-              sha256 = wasmBindgenSha;
-            };
-
-            codecBuild = rust-helpers.lib.buildRustPackage {
-              inherit system src cargoLock;
-              name = "${name}-codec";
-              target = "wasm32-unknown-unknown";
-            };
-          in
-          stdenv.mkDerivation (
-            (removeAttrs args [ "cargoLock" ])
-            // {
-              inherit codecBuild;
-              dontConfigure = true;
-              nativeBuildInputs = (args.nativeBuildInputs or [ ]) ++ [ wasm-bindgen-bin ];
-              buildPhase = ''
-                runHook preBuild
-
-                wasm-bindgen --target web --out-dir $out $codecBuild/*.wasm
-
-                runHook postBuild
-              '';
-              dontInstall = true;
-            }
-          );
-      };
-    };
-}
diff --git a/nix/wasm-bindgen/default.nix b/nix/wasm-bindgen/default.nix
new file mode 100644
index 000000000..9e7518027
--- /dev/null
+++ b/nix/wasm-bindgen/default.nix
@@ -0,0 +1,55 @@
+{
+  lib,
+  fetchCrate,
+  rustPlatform,
+  curl,
+  darwin,
+}:
+rec {
+  build =
+    { version, sha256 }:
+    let
+      src = fetchCrate {
+        pname = "wasm-bindgen-cli";
+        inherit version sha256;
+      };
+
+      cargoLock = {
+        lockFile = "${src}/Cargo.lock";
+      };
+    in
+    rustPlatform.buildRustPackage {
+      name = "wasm-bindgen-cli";
+      inherit src cargoLock;
+      buildInputs = [
+        curl
+        darwin.apple_sdk.frameworks.Security
+      ];
+      doCheck = false;
+    };
+
+  buildFromCargoLock =
+    {
+      system,
+      cargoLock,
+      sha256,
+    }:
+    assert (cargoLock.lockFile or null == null) != (cargoLock.lockFileContents or null == null);
+    let
+      lockFileContents =
+        if cargoLock.lockFile != null then
+          builtins.readFile cargoLock.lockFile
+        else
+          cargoLock.lockFileContents;
+
+      parsedLockFile = builtins.fromTOML lockFileContents;
+
+      wasm-bindgen-version =
+        (lib.lists.findFirst (x: x.name == "wasm-bindgen") null parsedLockFile.package).version;
+    in
+    assert wasm-bindgen-version != null;
+    build {
+      inherit system sha256;
+      version = wasm-bindgen-version;
+    };
+}
diff --git a/nix/wasm-bindgen/flake.nix b/nix/wasm-bindgen/flake.nix
deleted file mode 100644
index bc7bf6138..000000000
--- a/nix/wasm-bindgen/flake.nix
+++ /dev/null
@@ -1,60 +0,0 @@
-{
-  outputs =
-    { self, nixpkgs }:
-    {
-      lib = {
-        build =
-          {
-            system,
-            version,
-            sha256,
-          }:
-          with nixpkgs.legacyPackages.${system};
-          let
-            src = pkgs.fetchCrate {
-              pname = "wasm-bindgen-cli";
-              inherit version sha256;
-            };
-
-            cargoLock = {
-              lockFile = "${src}/Cargo.lock";
-            };
-          in
-          rustPlatform.buildRustPackage {
-            name = "wasm-bindgen-cli";
-            inherit src cargoLock;
-            buildInputs = [
-              curl
-              darwin.apple_sdk.frameworks.Security
-            ];
-            doCheck = false;
-          };
-
-        buildFromCargoLock =
-          {
-            system,
-            cargoLock,
-            sha256,
-          }:
-          with nixpkgs.legacyPackages.${system};
-          assert (cargoLock.lockFile or null == null) != (cargoLock.lockFileContents or null == null);
-          let
-            lockFileContents =
-              if cargoLock.lockFile != null then
-                builtins.readFile cargoLock.lockFile
-              else
-                cargoLock.lockFileContents;
-
-            parsedLockFile = builtins.fromTOML lockFileContents;
-
-            wasm-bindgen-version =
-              (lib.lists.findFirst (x: x.name == "wasm-bindgen") null parsedLockFile.package).version;
-          in
-          assert wasm-bindgen-version != null;
-          self.lib.build {
-            inherit system sha256;
-            version = wasm-bindgen-version;
-          };
-      };
-    };
-}