diff --git a/build/ci/job-template.yml b/build/ci/job-template.yml
index 9e5e19cfc3..5f7b888fba 100644
--- a/build/ci/job-template.yml
+++ b/build/ci/job-template.yml
@@ -58,7 +58,7 @@ jobs:
           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
+      - script: brew update && brew unlink python@3.8 && brew install mono-libgdiplus && brew install $(Build.SourcesDirectory)/build/libomp.rb && 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"
diff --git a/build/vsts-ci.yml b/build/vsts-ci.yml
index 36874b2105..98dfa10e4a 100644
--- a/build/vsts-ci.yml
+++ b/build/vsts-ci.yml
@@ -46,6 +46,13 @@ phases:
   queue:
     name: Hosted macOS
   steps:
+  # Work around MacOS Homebrew image/environment bug: https://github.com/actions/virtual-environments/issues/1811
+  - 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
   - script: brew update && brew install $(Build.SourcesDirectory)/build/libomp.rb && brew link libomp --force
     displayName: Install build dependencies
   # Only build native assets to avoid conflicts.