我正在尝试在Windows中为Haskell安装Gtk并出现以下错误：
C:\Users\abcd>cabal install haskell-gi
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...
Configuring haskell-gi-base-0.23.0...
cabal: The program 'pkg-config' version >=0.9.0 is required but it could not
be found.
Failed to install haskell-gi-base-0.23.0
cabal: Error: some packages failed to install:
haskell-gi-0.23.0-1JHtHU5x2lkFiOcPtWhSw4 depends on haskell-gi-0.23.0 which
failed to install.
haskell-gi-base-0.23.0-6DTOa44NYLKIXS94FQX9lI failed during the configure
step. The exception was:
ExitFailure 1
但是，我已经使用Msys2安装（并重新安装了）pkg-config：
$ pacman -S pkg-config
warning: pkg-config-0.29.2-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...
Packages (1) pkg-config-0.29.2-1
Total Installed Size: 0.54 MiB
Net Upgrade Size: 0.00 MiB
:: Proceed with installation? [Y/n]
(1/1) checking keys in keyring [###############################################################################] 100%
(1/1) checking package integrity [###############################################################################] 100%
(1/1) loading package files [###############################################################################] 100%
(1/1) checking for file conflicts [###############################################################################] 100%
(1/1) checking available disk space [###############################################################################] 100%
:: Processing package changes...
(1/1) reinstalling pkg-config [###############################################################################] 100%
问题出在哪里，如何解决？感谢您的帮助。