I cloned the package and ran install.bat.
The result is
$ dub build --build=release --config=client
Performing "release" build using ldc2 for x86.
experimental_allocator 2.70.0-b1: building configuration
"library"...
Using Visual Studio: C:\Program Files (x86)\Microsoft Visual
Studio 14.0\
LINK : fatal error LNK1104: cannot open file
'..\..\..\..\Roaming\dub\packages\experimental_allocator-2.70.0-b1\experimental_allocator\.dub\build\library-release-windows-x86-ldc_0-341F845AB271E17D9C62794DCB77B6FB\experimental_allocator.lib'
Error: `C:\WINDOWS\system32\cmd.exe /s /c
"C:\D\ldc2\bin\amd64.bat lib.exe"` failed with status: 1104
ldc2 failed with exit code 1104.
Error while compiling DCD.
Program exited with code 1
There is on --config=client for the current version of dub so I
went to the location of the source for experimental_allocator and
ran dub build --build=release --config=library instead, which
generated the missing file. Problem is I don't know how to fix
this in your build instructions so that the compellation will
resume or continue to completion. Please assist.
Thanks,
Andrew