Disables ubuntu github workflows
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 999f950..82f225b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,8 @@
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-18.04, ubuntu-16.04, macOS-10.14]
+        os: [macOS-10.14]
+        #os: [ubuntu-18.04, ubuntu-16.04, macOS-10.14]
         compiler: [gcc, clang]
         include:
           - os: ubuntu-18.04