fix: virtual libraries bug #27071

Job	Run time
Coq 8.16.1	9m 13s
Create local opam switch (macos-latest, 5)	5m 36s
Build (macos-latest, 4.14.x)	17m 36s
Create local opam switch (macos-latest, 4.14)	5m 28s
Coverage (4.14.x)	11m 24s
Build (ubuntu-latest, 4.14.x)	10m 51s
Create local opam switch (ubuntu-latest, 5)	5m 53s
Build (windows-latest, 4.14.x)	6m 24s
MSVC 4.14.0 / windows_x86	10m 20s
Create local opam switch (ubuntu-latest, 4.14)	5m 14s
Build (ocaml-variants.5.3.0+trunk, ubuntu-latest, true)	2m 19s
Documentation	36s
MSVC 4.14.0 / windows_x86_64	10m 18s
Build (5.1.x, ubuntu-latest, true)	2m 31s
Format	2m 22s
Build monorepo benchmark docker image	3m 52s
Build (5.1.x, macos-latest, true)	2m 51s
Nix (macos-latest)	1m 54s
Nix (ubuntu-latest)	56s
Build (4.14.x, macos-13, true)	5m 0s
Build (4.13.x, ubuntu-latest, true)	2m 19s
Build (4.08.x, ubuntu-latest, true)	2m 22s
Build (4.04.x, ubuntu-latest, true, true)	5m 55s
Build (4.02.x, ubuntu-latest, true)	4m 36s
	2h 15m 50s

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