diff --git a/testing/mozharness/mozharness/mozilla/building/buildbase.py b/testing/mozharness/mozharness/mozilla/building/buildbase.py
index e3675d7ada6e..64bead85b319 100755
--- a/testing/mozharness/mozharness/mozilla/building/buildbase.py
+++ b/testing/mozharness/mozharness/mozilla/building/buildbase.py
@@ -785,10 +785,6 @@ items from that key's value."
 
         args = ["build", "-v"]
 
-        custom_build_targets = self.config.get("build_targets")
-        if custom_build_targets:
-            args += custom_build_targets
-
         # This will error on non-0 exit code.
         self._run_mach_command_in_build_env(args)
 
diff --git a/third_party/python/gyp/pylib/gyp/generator/analyzer.py b/third_party/python/gyp/pylib/gyp/generator/analyzer.py
index b3484dcb1bed..f9e1e9f6fa0b 100644
--- a/third_party/python/gyp/pylib/gyp/generator/analyzer.py
+++ b/third_party/python/gyp/pylib/gyp/generator/analyzer.py
@@ -524,11 +524,6 @@ def _WriteOutput(params, **values):
     print('The following targets were not found:')
     for target in values['invalid_targets']:
       print('\t', target)
-  if 'build_targets' in values:
-    values['build_targets'].sort()
-    print('Targets that require a build:')
-    for target in values['build_targets']:
-      print('\t', target)
   if 'compile_targets' in values:
     values['compile_targets'].sort()
     print('Targets that need to be built:')