diff --git a/.travis.yml b/.travis.yml
index 769a9ab..021066d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,10 +5,14 @@ script:
 - make -C auto clobber
 - make extensions
 - make dist-src
-- make clean; SYSTEM=linux        make 
-- make clean; SYSTEM=linux-osmesa make
-- pushd build/cmake; git clean -xdf .; cmake -G 'Unix Makefiles' .                ; make; popd
-- pushd build/cmake; git clean -xdf .; cmake -G 'Unix Makefiles' -DGLEW_OSMESA=1 .; make; popd
+- make clean; SYSTEM=linux            make 
+- make clean; SYSTEM=linux-osmesa     make
+- make clean; SYSTEM=linux-egl        make
+- make clean; SYSTEM=linux-clang      make 
+- make clean; SYSTEM=linux-clang-egl  make 
+- pushd build/cmake; git clean -xdf .; cmake -G 'Unix Makefiles' .                 ; make; popd
+- pushd build/cmake; git clean -xdf .; cmake -G 'Unix Makefiles' -DGLEW_OSMESA=1 . ; make; popd
+- pushd build/cmake; git clean -xdf .; cmake -G 'Unix Makefiles' -DGLEW_EGL=1 .    ; make; popd
 addons:
   apt:
     packages:
@@ -16,6 +20,7 @@ addons:
     - cmake
     - dos2unix
     - libosmesa6-dev
+    - libegl1-mesa-dev
   artifacts:
     bucket: glew
     s3_region: "us-east-1"