nixpkgs/pkgs/tools/networking/vpnc
Sergei Trofimovich 49000d52e0 vpnc: disable install parallelism
Without the change parallel installs fail as:

    install flags: -j1
    ...
    install -m644 src/doc/*.md ...-vpnc-unstable-2021-11-04/share/doc/vpnc
    install: target '...-vpnc-unstable-2021-11-04/share/doc/vpnc': No such file or directory
2023-03-07 07:34:51 +00:00
..
default.nix vpnc: disable install parallelism 2023-03-07 07:34:51 +00:00