diff --git a/.travis.yml b/.travis.yml
index 98ac61d166..6fb19648e2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,12 +1,21 @@
 sudo: false
 language: c
-os:
-  - linux
-  - osx
+
 dist: trusty
 
-#matrix:
-#  allow_failures:
+matrix:
+  include:
+    - os: linux
+      env: NIM_COMPILE_TO_CPP=false
+
+    - os: osx
+      env: NIM_COMPILE_TO_CPP=false
+
+    - os: osx
+      env: NIM_COMPILE_TO_CPP=true
+
+  allow_failures:
+    - env: NIM_COMPILE_TO_CPP=true
 #    - os: osx
 
 addons: