diff --git a/.gitignore b/.gitignore
index 330d167..33be9ad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -88,3 +88,5 @@ fastlane/test_output
 # https://github.com/johnno1962/injectionforxcode
 
 iOSInjectionProject/
+
+.swiftpm
diff --git a/.swiftpm/configuration/Package.resolved b/.swiftpm/configuration/Package.resolved
deleted file mode 100644
index 9a446d3..0000000
--- a/.swiftpm/configuration/Package.resolved
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-  "pins" : [
-    {
-      "identity" : "swift-argument-parser",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/apple/swift-argument-parser",
-      "state" : {
-        "revision" : "41982a3656a71c768319979febd796c6fd111d5c",
-        "version" : "1.5.0"
-      }
-    }
-  ],
-  "version" : 2
-}
diff --git a/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
deleted file mode 100644
index 919434a..0000000
--- a/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Workspace
-   version = "1.0">
-   <FileRef
-      location = "self:">
-   </FileRef>
-</Workspace>
diff --git a/.swiftpm/xcode/package.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings b/.swiftpm/xcode/package.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
deleted file mode 100644
index 54782e3..0000000
--- a/.swiftpm/xcode/package.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>IDEWorkspaceSharedSettings_AutocreateContextsIfNeeded</key>
-	<true/>
-</dict>
-</plist>
diff --git a/Plugins/MetalCompilerPlugin/MetalPlugin.swift b/Plugins/MetalCompilerPlugin/MetalPlugin.swift
index 2448e26..72b5b37 100644
--- a/Plugins/MetalCompilerPlugin/MetalPlugin.swift
+++ b/Plugins/MetalCompilerPlugin/MetalPlugin.swift
@@ -190,6 +190,13 @@ struct MetalCompiler: Decodable {
         environment["TMPDIR"] = "/private/tmp"
         verbose?("Custom TMPDIR: /private/tmp")
 
+        if let extraEnvironment = config.extraEnvironment {
+            for (key, value) in extraEnvironment {
+                environment[key] = value
+                verbose?("Extra environment: \(key)=\(value)")
+            }
+        }
+
         arguments += ["-DMETAL"]
 
         verbose?("Build command environment:")