diff --git a/samples/mpscore/build.xml b/samples/mpscore/build.xml
index abe71cd6..8b087688 100644
--- a/samples/mpscore/build.xml
+++ b/samples/mpscore/build.xml
@@ -1452,7 +1452,6 @@
         <uses>
           <language id="l:f3061a53-9226-4cc5-a443-f952ceaf5816:jetbrains.mps.baseLanguage" />
           <language id="l:fd392034-7849-419d-9071-12563d152375:jetbrains.mps.baseLanguage.closures" />
-          <language id="l:9e36d2ee-c59c-4580-9e81-646748d0614b:jetbrains.mps.baseLanguage.closuresExt" />
           <language id="l:83888646-71ce-4f1c-9c53-c54016f6ad4f:jetbrains.mps.baseLanguage.collections" />
           <language id="l:f2801650-65d5-424e-bb1b-463a8781b786:jetbrains.mps.baseLanguage.javadoc" />
           <language id="l:760a0a8c-eabb-4521-8bfd-65db761a9ba3:jetbrains.mps.baseLanguage.logging" />