diff --git a/src/cache-extract-entries.ts b/src/cache-extract-entries.ts
index c7bbe67..fbe7072 100644
--- a/src/cache-extract-entries.ts
+++ b/src/cache-extract-entries.ts
@@ -387,7 +387,7 @@ export class ConfigurationCacheEntryExtractor extends AbstractEntryExtractor {
      * set of project roots, to allow saving of configuration-cache entries for each.
      */
     private getProjectRoots(): string[] {
-        const projectList = path.resolve(this.gradleUserHome, PROJECT_ROOTS_FILE)
+        const projectList = path.resolve(process.env['RUNNER_TEMP']!, PROJECT_ROOTS_FILE)
         if (!fs.existsSync(projectList)) {
             core.info(`Missing project list file ${projectList}`)
             return []
diff --git a/src/resources/project-root-capture.plugin.groovy b/src/resources/project-root-capture.plugin.groovy
index cb887b0..0886c64 100644
--- a/src/resources/project-root-capture.plugin.groovy
+++ b/src/resources/project-root-capture.plugin.groovy
@@ -10,7 +10,7 @@ import org.gradle.tooling.events.*
 
 settingsEvaluated { settings ->
     def rootDir = settings.rootDir.absolutePath
-    def rootListLocation = new File(settings.gradle.gradleUserHomeDir, "project-roots.txt").absolutePath
+    def rootListLocation = new File(System.getenv("RUNNER_TEMP"), "project-roots.txt").absolutePath
 
     def projectTracker = gradle.sharedServices.registerIfAbsent("gradle-build-action-projectRootTracker", ProjectTracker, { spec ->
         spec.getParameters().getRootDir().set(rootDir);