.nimble file like:

requires "nim >= 1.6.0",
          "libp2p",
          "ggplotnim"

Fails with:

1.692 Downloading <https://github.com/status-im/nim-libp2p> using git
3.470   Verifying dependencies for libp2p@1.1.0
...
53.82      Error: Cannot satisfy the dependency on unittest2 0.0.9 and unittest2 0.2.1

.nimble file like:

requires "nim >= 1.6.0",
          "libp2p#08d9c84aca622f39a434880fee9f9648fd4b60cf",
          "ggplotnim"

Which corresponds to version https://github.com/status-im/nim-libp2p/commit/08d9c84aca622f39a434880fee9f9648fd4b60cf

Results with 300 nodes in metal-01.he-eu-hel1.vacdst.misc :

No packet drop.

.nimble file like:

requires "nim >= 1.6.0",
          "libp2p#7c195ab9279d6fe57e8134681b1329b01b0e115f",
          "ggplotnim"