diff --git a/.travis.yml b/.travis.yml
index d3f72d46f3d9bb9930abff9e10b83cff810ec3f0..140072b80199c1e73bce05234e88d76ee712c82b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,10 +21,10 @@ matrix:
     - compiler: clang
       os: osx
       before_install:
+        - brew uninstall python mercurial postgis sfcgal cgal gdal
         - brew update
-        - brew unlink python
         - brew upgrade
-        - brew install rpcgen yajl
+        - brew install python rpcgen yajl
       script:
         # We can't run make distcheck/syntax-check because they
         # fail on macOS, but doing 'install' and 'dist' gives us