diff --git a/build.gradle b/build.gradle
index 4bbe42c..ab9c7af 100644
--- a/build.gradle
+++ b/build.gradle
@@ -108,6 +108,8 @@ task runServer(type: JavaExec) {
 
     if (System.getProperty("logImplDir") != null) {
         classpath += files(fileTree(dir: new File(System.getProperty("logImplDir"))))
+    } else {
+        classpath += files(fileTree(dir: new File(workingDir, "log-impl")))
     }
 
     System.getProperties().stringPropertyNames().stream()