coqide-server build error on Windows

[rtetley]

Description of the problem

There seems to be a problem with building coqide-server on Cygwin.
See https://github.com/coq-community/vscoq/actions/runs/7544033174/job/20536408452?pr=706

Error:  The compilation of coqide-server failed at "C:\\ci\\cygwin64\\opam\\CP.2023.11.0~dev\\bin\\dune.exe subst".

#=== ERROR while compiling coqide-server.dev ==================================#
# context              2.0.10 | win32/x86_64 | ocaml-variants.4.13.1+flambda+mingw64c | https://coq.inria.fr/opam/core-dev#2024-01-16 13:33
# path                 C:/ci/cygwin64/opam/CP.2023.11.0~dev/.opam-switch/build/coqide-server.dev
# command              C:\ci\cygwin64\opam\CP.2023.11.0~dev\bin\dune.exe subst
# exit-code            1
# env-file             C:/ci/cygwin64/opam/log/coqide-server-604-d8a4ae.env
# output-file          C:/ci/cygwin64/opam/log/coqide-server-604-d8a4ae.out
### output ###
# Error:
# stat(test-suite/prerequisite/library_attributes.v): No such file or directory

This is probably due to the fact that test-suite/prerequisite/library_attributes.v is a sym link ?

Coq Version

The CI runs use the dev pick of the coq platform so coq#master is used