diff --git a/client/src/driver/BitBakeProjectScanner.ts b/client/src/driver/BitBakeProjectScanner.ts
index 75a0c8b5..95eb5ec2 100644
--- a/client/src/driver/BitBakeProjectScanner.ts
+++ b/client/src/driver/BitBakeProjectScanner.ts
@@ -238,8 +238,8 @@ export class BitBakeProjectScanner {
     if (this.containerMountPoint === undefined && !hostToContainer) {
       // Should only be called through scanAvailableLayers()
       const hostWorkdir = this.bitbakeDriver?.getBuildConfig('workingDirectory')
-      if (hostWorkdir === undefined) {
-        throw new Error('hostWorkdir is undefined')
+      if (typeof hostWorkdir !== 'string') {
+        throw new Error('hostWorkdir is not a string')
       }
       await this.scanContainerMountPoint(inputPath, hostWorkdir)
     }