diff --git a/.github/workflows/build.sh b/.github/workflows/build.sh
index 98bbbe472..f00311c13 100755
--- a/.github/workflows/build.sh
+++ b/.github/workflows/build.sh
@@ -1,11 +1,12 @@
 
 if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
   # webp, zstd, xz, libtiff, libxcb cause a conflict with building webp, libtiff, libxcb
+  # libxdmcp causes an issue on macOS < 11
   # curl from brew requires zstd, use system curl
   # if php is installed, brew tries to reinstall these after installing openblas
   # remove lcms2 to fix building openjpeg on arm64
   # remove xmlto to skip building giflib docs
-  brew remove --ignore-dependencies webp zstd xz libtiff libxcb curl php lcms2 xmlto ghostscript
+  brew remove --ignore-dependencies webp zstd xz libtiff libxcb libxdmcp curl php lcms2 xmlto ghostscript
 
   if [[ "$PLAT" == "arm64" ]]; then
     export MACOSX_DEPLOYMENT_TARGET="11.0"