diff --git a/build/ci/job-template.yml b/build/ci/job-template.yml
index 52abf2dc99..9e5e19cfc3 100644
--- a/build/ci/job-template.yml
+++ b/build/ci/job-template.yml
@@ -49,8 +49,16 @@ jobs:
       container: ${{ parameters.container }}
 
     steps:
+    # Work around MacOS Homebrew image/environment bug: https://github.com/actions/virtual-environments/issues/1811
     - ${{ if eq(parameters.pool.name, 'Hosted macOS') }}:
-      - script: brew update && brew install $(Build.SourcesDirectory)/build/libomp.rb && brew unlink python@2 && brew install mono-libgdiplus gettext && brew link gettext --force && brew link libomp --force
+      - script: |
+          brew uninstall openssl@1.0.2t |
+          brew uninstall python@2.7.17 |
+          brew untap local/openssl |
+          brew untap local/python2
+        displayName: MacOS Homebrew bug Workaround
+    - ${{ if eq(parameters.pool.name, 'Hosted macOS') }}:
+      - script: brew update && brew install cmake $(Build.SourcesDirectory)/build/libomp.rb && brew install mono-libgdiplus gettext && brew link gettext --force && brew link libomp --force
         displayName: Install build dependencies
     - ${{ if and( eq(parameters.nightlyBuild, 'true'), eq(parameters.pool.name, 'Hosted Ubuntu 1604')) }}:
       - bash: echo "##vso[task.setvariable variable=LD_LIBRARY_PATH]$(nightlyBuildRunPath):$LD_LIBRARY_PATH"