Defaulting env to Ninja in the build matrix
diff --git a/.travis.yml b/.travis.yml
index 7dbfbc5..4334a9e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,44 +11,40 @@
     packages:
     - ninja-build
 
-matrix:
-  env:
+env:
+  global:
+    TOOLCHAIN=NATIVE
     CMAKE_GENERATOR=Ninja
+
+matrix:
   include:
   - os: linux
     compiler: gcc
     env:
-      TOOLCHAIN=NATIVE
       TARGET=x86_64-linux-gnu
   - os: linux
     compiler: clang
     env:
-      TOOLCHAIN=NATIVE
       TARGET=x86_64-linux-gnu
   - os: osx
     compiler: gcc
     env:
-      TOOLCHAIN=NATIVE
       TARGET=x86_64-osx
   - os: osx
     compiler: clang
     env:
-      TOOLCHAIN=NATIVE
       TARGET=x86_64-osx
   - os: windows
     env:
-      TOOLCHAIN=NATIVE
       TARGET=x86_64-windows
       CMAKE_GENERATOR="Visual Studio 15 2017 Win64"
   - os: linux-ppc64le
     compiler: gcc
     env:
-      TOOLCHAIN=NATIVE
       TARGET=ppc64le-linux-gnu
   - os: linux-ppc64le
     compiler: clang
     env:
-      TOOLCHAIN=NATIVE
       TARGET=ppc64le-linux-gnu
   # Toolchains for little-endian, 64-bit ARMv8 for GNU/Linux systems
   - os: linux