diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ad4a7e52ea..9d58869a18 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -126,6 +126,7 @@ build.xsh:
     - conda install -c conda-forge llvmdev
     - export LFORTRAN_CMAKE_GENERATOR="Unix Makefiles"
     - export WIN=0
+    - export MACOS=0
     - xonsh ci/build.xsh
 
 # Build and upload documentation
diff --git a/appveyor.yml b/appveyor.yml
index d0b44375b5..d8485b65c2 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -12,4 +12,5 @@ build_script:
 - set CONDA_PREFIX=C:\\Miniconda37-x64
 - set LFORTRAN_CMAKE_GENERATOR=Visual Studio 15 2017 Win64
 - set WIN=1
+- set MACOS=0
 - xonsh ci\build.xsh