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我試圖在Windows 10的x64上GHC 8.0.1與小集團安裝GHC-MOD：麻煩安裝GHC-MOD
C:\WINDOWS\system32>cabal install ghc-mod
Resolving dependencies...
cabal: Could not resolve dependencies:
trying: ghc-mod-5.5.0.0 (user goal)
trying: djinn-lib-0.0.1.2/installed-I8G... (dependency of djinn-ghc-0.0.2.3)
next goal: mtl (dependency of ghc-mod-5.5.0.0)
rejecting: mtl-2.2.1/installed-6qs... (conflict: mtl =>
transformers==0.5.2.0/installed-0.5..., ghc-mod => transformers<0.5)
rejecting: mtl-2.2.1, mtl-2.2.0.1, mtl-2.2, mtl-2.1.3.1, mtl-2.1.2, mtl-2.1.1,
mtl-2.1, mtl-2.0.1.1, mtl-2.0.1.0, mtl-2.0.0.0, mtl-1.1.1.1, mtl-1.1.1.0,
mtl-1.1.0.2, mtl-1.1.0.1, mtl-1.1.0.0, mtl-1.0 (conflict: djinn-lib =>
mtl==2.2.1/installed-6qs...)
Backjump limit reached (currently 2000, change with --max-backjumps or try to
run with --reorder-goals).
然後改變backjumps：
C:\WINDOWS\system32>cabal install ghc-mod --max-backjumps 9999
Resolving dependencies...
Configuring old-time-1.1.0.3...
Failed to install old-time-1.1.0.3
Build log (C:\Users\xx\AppData\Roaming\cabal\logs\old-time-1.1.0.3.log):
Configuring old-time-1.1.0.3...
configure: WARNING: unrecognized options: --with-compiler
checking for gcc... C:\PROGRA~1\HASKEL~1\802E01~1.1\mingw\bin\gcc.exe
checking whether the C compiler works... no
configure: error: in `/cygdrive/c/Users/xx/AppData/Local/Temp/cabal-tmp-3644/old-time-1.1.0.3':
configure: error: C compiler cannot create executables
See `config.log' for more details
cabal: Leaving directory 'C:\Users\xx\AppData\Local\Temp\cabal-tmp-3644\old-time-1.1.0.3'
cabal: Error: some packages failed to install:
cpphs-1.20.1 depends on old-time-1.1.0.3 which failed to install.
ghc-mod-5.0.0 depends on old-time-1.1.0.3 which failed to install.
haskell-src-exts-1.17.1 depends on old-time-1.1.0.3 which failed to install.
hlint-1.9.32 depends on old-time-1.1.0.3 which failed to install.
old-time-1.1.0.3 failed during the configure step. The exception was:
ExitFailure 77
我已經嘗試安裝MinGW + MSYS和Cygwin，但都不起作用。所有的GHC文件夾都在PATH環境變量中。
嘗試'堆棧'，它只是工作。 – arrowd
我安裝了堆棧，但它迫使我從GHC 8.0.1降級到7.10，我不確定堆棧是否可以與GHC 8 – tsorn
上次檢查您需要使用ghc-8分支來獲得ghc-mod的工作無論如何ghc8 - 所以'安裝ghc-mod'可能現在不適用於8.0.1 – Carsten