diff --git a/projects/facebook.com/watchman/package.yml b/projects/facebook.com/watchman/package.yml
index 1cbf15d3..ed8c01ba 100644
--- a/projects/facebook.com/watchman/package.yml
+++ b/projects/facebook.com/watchman/package.yml
@@ -44,6 +44,7 @@ build:
       CXXFLAGS:
         - -fPIC
         - -latomic
+        - -Wl,--allow-shlib-undefined
       CMAKE_ARGS:
         - -DCMAKE_C_FLAGS=-fPIC
         - -DCMAKE_EXE_LINKER_FLAGS=-pie