diff -rupN qt-creator-opensource-src-3.4.0/src/plugins/cmakeprojectmanager/makestep.cpp qt-creator-opensource-src-3.4.0-new/src/plugins/cmakeprojectmanager/makestep.cpp
--- qt-creator-opensource-src-3.4.0/src/plugins/cmakeprojectmanager/makestep.cpp	2015-04-21 17:56:56.000000000 +0200
+++ qt-creator-opensource-src-3.4.0-new/src/plugins/cmakeprojectmanager/makestep.cpp	2015-04-28 21:53:37.014334401 +0200
@@ -316,7 +316,7 @@ QString MakeStep::makeCommand(ProjectExp
     if (!bc)
         bc = targetsActiveBuildConfiguration();
     if (bc && bc->useNinja())
-        return QLatin1String("ninja");
+        return QLatin1String("ninja-build");
 
     if (tc)
         return tc->makeCommand(env);