build: Only set PATH for GStreamer (#31078)

The documentation claims that this is the only environment variable that
needs to be set before build.

1 files changed, 6 insertions, 2 deletions

diff --git a/python/servo/command_base.py b/python/servo/command_base.py
index e4e1642e9ec..a6ea3add044 100644
--- a/python/servo/command_base.py
+++ b/python/servo/command_base.py
@@ -498,9 +498,13 @@ class CommandBase(object):
         """Return an extended environment dictionary."""
         env = os.environ.copy()
 
+        # If we are installing on MacOS and Windows, we need to make sure that GStreamer's
+        # `pkg-config` is on the path and takes precedence over other `pkg-config`s.
         if self.enable_media and not self.is_android_build:
-            servo.platform.get().set_gstreamer_environment_variables_if_necessary(
-                env, cross_compilation_target=self.cross_compile_target)
+            platform = servo.platform.get()
+            gstreamer_root = platform.gstreamer_root(cross_compilation_target=self.cross_compile_target)
+            if gstreamer_root:
+                util.prepend_paths_to_env(env, "PATH", os.path.join(gstreamer_root, "bin"))
 
         effective_target = self.cross_compile_target or servo.platform.host_triple()
         if "msvc" in effective_target: