diff --git a/changelog.md b/changelog.md
index c739ff16..3a021311 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,7 @@
 # Architect Sandbox changelog
 
+- Updated path.join to path.posix.join to resolve an issue where the resulting value of ARC_STATIC_BUCKET would be invalid on Windows
+
 ---
 ## [8.0.0] 2025-09-24
 
diff --git a/src/lib/user-env-vars.js b/src/lib/user-env-vars.js
index 2f072362..45a22db4 100644
--- a/src/lib/user-env-vars.js
+++ b/src/lib/user-env-vars.js
@@ -1,4 +1,4 @@
-let { join } = require('path')
+let { join } = require('path/posix')
 let { version } = require('../../package.json')
 
 // Assemble Architect + userland env vars