diff --git a/osx/build_app.sh b/osx/build_app.sh
index f9900a5c..4e2cb8a1 100755
--- a/osx/build_app.sh
+++ b/osx/build_app.sh
@@ -39,7 +39,7 @@ cp osx/conf.py meld/conf.py
 ${INSTROOT}/bin/python3 -c "import sys; print('\n'.join(sys.path))"
 
 PY_SITE_PACKAGES=$(~/gtk/inst/bin/python3 -c 'import site; print(site.getsitepackages()[0], end="")')
-/usr/local/bin/pip3 install distro py2app --target $PY_SITE_PACKAGES
+/usr/local/bin/pip3 install distro pyobjc-core pyobjc-framework-Cocoa py2app --target $PY_SITE_PACKAGES
 
 glib-compile-schemas data
 ${INSTROOT}/bin/python3 setup_py2app.py build