diff --git a/sigstore-gradle/sigstore-gradle-sign-base-plugin/src/main/kotlin/dev/sigstore/sign/tasks/SigstoreSignFilesTask.kt b/sigstore-gradle/sigstore-gradle-sign-base-plugin/src/main/kotlin/dev/sigstore/sign/tasks/SigstoreSignFilesTask.kt
index d8123527..52aa7710 100644
--- a/sigstore-gradle/sigstore-gradle-sign-base-plugin/src/main/kotlin/dev/sigstore/sign/tasks/SigstoreSignFilesTask.kt
+++ b/sigstore-gradle/sigstore-gradle-sign-base-plugin/src/main/kotlin/dev/sigstore/sign/tasks/SigstoreSignFilesTask.kt
@@ -121,7 +121,12 @@ abstract class SigstoreSignFilesTask : DefaultTask() {
     @TaskAction
     protected fun sign() {
         workerExecutor
-            .classLoaderIsolation { classpath.from(sigstoreClientClasspath) }
+            .processIsolation {
+                classpath.from(sigstoreClientClasspath)
+                forkOptions {
+                    environment(System.getenv())
+                }
+            }
             .run {
                 for (signature in signatures) {
                     submit(SignWorkAction::class.java) {