[MonoDevelop] OS-X MonoDevelop | Version 6.0 (build 2458) | "make app" fails

[Robert N]

MonoDevelop Version 6.0 (build 2458)

Most recent git pull : c3c1a25a521f1fea63cf6d689ea58176d3eae59a [Core] Register unsupported Universal Windows Platform (UWP) projects.

* Build (make) is successful, running (make run) is successful.
* Trying to make an `.app` bundle via `make app` within the `monodevelop/main/build/MacOSX` directory fails:

>make app
Creating directories in app bundle
mkdir -p MonoDevelop.app/Contents/{MacOS,Resources}
mkdir -p MonoDevelop.app/Contents/MacOS/share
mkdir -p MonoDevelop.app/Contents/Resources/lib/monodevelop
Copying MonoDevelop into app bundle
cp -pR ../AddIns MonoDevelop.app/Contents/Resources/lib/monodevelop
cp -pR ../../external/fsharpbinding/bin/ MonoDevelop.app/Contents/Resources/lib/monodevelop/AddIns/fsharpbinding
cp: ../../external/fsharpbinding/bin/: No such file or directory
make: *** [app] Error 1