Failed to download ICSharpCode.SharpZipLib from NuGet

[fusion809]

Commit 1947 (07e4f00) fails to build with make, here is the precise error:

OpenRA engine version d16e9ff is required.
Downloading engine...
Compiling engine...
make[1]: Entering directory '/data/GitHub/others/Romanovs-Vengeance/engine'
make[1]: Leaving directory '/data/GitHub/others/Romanovs-Vengeance/engine'
make[1]: Entering directory '/data/GitHub/others/Romanovs-Vengeance/engine'
Fetching ICSharpCode.SharpZipLib from NuGet
[SharpZipLib.zip]
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of SharpZipLib.zip or
        SharpZipLib.zip.zip, and cannot find SharpZipLib.zip.ZIP, period.
make[1]: *** [Makefile:174: cli-dependencies] Error 9
make[1]: Leaving directory '/data/GitHub/others/Romanovs-Vengeance/engine'
make: *** [Makefile:106: engine-dependencies] Error 2