diff --git a/build.gradle b/build.gradle
index 7f2894c38..42f457f71 100644
--- a/build.gradle
+++ b/build.gradle
@@ -32,7 +32,7 @@ if (project.hasProperty("forceCI")) {
     ext.ciBuild = true
 } else {
     //on teamcity we are in a CI build
-    if (project.hasProperty("teamcity") && project.hasProperty('mpsHomeDir')) {
+    if (project.hasProperty("teamcity") && !project.hasProperty('mpsHomeDir')) {
         ext.ciBuild = true
     } else {
         ext.ciBuild = false