Warning: The install command is a part of the legacy v1 style of cabal usage.

Please switch to using either the new project style and the new-install
command or the legacy v1-install alias as new-style projects will become the
default in the next version of cabal-install. Please file a bug if you cannot
replicate a working v1- use case with the new-style commands.

For more information, see: https://wiki.haskell.org/Cabal/NewBuild

Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: gi-soup (user goal)
[__0] rejecting: gi-soup-2.4.22 (conflict: pkg-config package libsoup-2.4-any,
not found in the pkg-config database)
[__0] rejecting: gi-soup-2.4.21, gi-soup-2.4.20, gi-soup-2.4.19,
gi-soup-2.4.18, gi-soup-2.4.16, gi-soup-2.4.15, gi-soup-2.4.14,
gi-soup-2.4.13, gi-soup-2.4.12, gi-soup-2.4.11, gi-soup-2.4.10, gi-soup-2.4.9,
gi-soup-2.4.8, gi-soup-2.4.7, gi-soup-2.4.6, gi-soup-2.4.5, gi-soup-2.4.4,
gi-soup-2.4.3, gi-soup-2.4.2, gi-soup-2.4.1, gi-soup-0.2.52.15,
gi-soup-0.2.52.14, gi-soup-0.2.52.13, gi-soup-0.2.52.12, gi-soup-0.2.52.10,
gi-soup-0.2.50.12, gi-soup-0.2.50.11, gi-soup-0.2.50.10, gi-soup-0.2.50.9,
gi-soup-0.2.50.8 (constraint from user target requires ==2.4.22)
[__0] fail (backjumping, conflict set: gi-soup)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gi-soup