diff --git a/etc/taskcluster/decision_task.py b/etc/taskcluster/decision_task.py
index 6516c1304ab..e4d3876caca 100644
--- a/etc/taskcluster/decision_task.py
+++ b/etc/taskcluster/decision_task.py
@@ -494,7 +494,6 @@ def macos_release_build_with_debug_assertions(priority=None):
             "./etc/ci/lockfile_changed.sh",
             "tar -czf target.tar.gz" +
             " target/release/servo" +
-            " target/release/*.so" +
             " target/release/*.dylib" +
             " resources",
         ]))
diff --git a/python/servo/gstreamer.py b/python/servo/gstreamer.py
index 2e2e66cba32..5a810711770 100644
--- a/python/servo/gstreamer.py
+++ b/python/servo/gstreamer.py
@@ -80,7 +80,9 @@ WINDOWS_PLUGINS = [
 ]
 
 MACOS_PLUGINS = [
-    ("gstapplemedia", "gst-plugins-bad"),
+    # Temporarily disabled until CI is using Mojave.
+    # https://github.com/servo/saltfs/issues/1011
+    # ("gstapplemedia", "gst-plugins-bad"),
     ("gstosxaudio", "gst-plugins-good"),
     ("gstosxvideo", "gst-plugins-good"),
 ]
@@ -140,10 +142,10 @@ def macos_plugins():
             path,
             "lib",
             "gstreamer-1.0",
-            "lib" + name + ".so"
+            "lib" + name + ".dylib"
         ) for name, path in GSTREAMER_PLUGINS + MACOS_PLUGINS
     ] + [
-        os.path.join(macos_libnice(), "gstreamer-1.0", "libgstnice.so"),
+        os.path.join(macos_libnice(), "gstreamer-1.0", "libgstnice.dylib"),
     ]