Hi Matt, When I built libglvnd on my docker "clean" build environment it seemed to be missing a dependency for xorg-libxext. I got: checking for PTHREAD_PRIO_INHERIT... yes checking for pkg-config... /usr/bin/pkg-config checking pkg-config is at least version 0.9.0... yes checking for x11... yes checking for xext... no configure: error: Package requirements (xext) were not met: No package 'xext' found Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. Alternatively, you may set the environment variables XEXT_CFLAGS and XEXT_LIBS to avoid the need to call pkg-config. See the pkg-config man page for more details. =======> ERROR: Building '/usr/ports/pkgs/libglvnd#1.0.0-1.pkg.tar.xz' failed. -- Packages where install failed libglvnd When I installed xorg-libxext manually the build went fine. Regards, Daryl