The Python3 package has started failing to install from HomeBrew with the following: Error: The `brew link` step did not complete successfully The formula built, but is not symlinked into /usr/local Could not symlink Frameworks/Python.framework/Headers Target /usr/local/Frameworks/Python.framework/Headers is a symlink belonging to python@2. You can unlink it: brew unlink python@2 To force the link and overwrite all conflicting files: brew link --overwrite python The result is that libvirt fails to find python3: checking for python3... no configure: error: 'python3' binary is required to build libvirt It is unclear what changed in Travis/HomeBrew to break our previously working setup, but running the suggested command fixes it well enough for libvirt's CI needs. Signed-off-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; --- Pushed as a CI build fix .travis.yml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/.travis.yml b/.travis.yml index 44ff5e9898..f129706456 100644 --- a/.travis.yml +++ b/.travis.yml @@ -67,6 +67,9 @@ matrix: env: - PATH="/usr/local/opt/gettext/bin:/usr/local/opt/ccache/libexec:/usr/local/opt/rpcgen/bin:$PATH" - PKG_CONFIG_PATH="/usr/local/opt/libxml2/lib/pkgconfig" + before_script: + # Hack to blow away py2 + - brew link --overwrite python script: # We can't run 'distcheck' or 'syntax-check' because they fail on # macOS, but doing 'install' and 'dist' gives us some useful coverage -- 2.24.1