I am unable to build Haddock 2.1, with the odd error: src/Haddock/GHC/Typecheck.hs:82:4: Constructor `HsModule' should have 7 arguments, but has been given 8 What is the root of it, you think? -- _jsn Configuring haddock-2.1.0... Dependency base-any: using base-3.0.2.0 Dependency haskell98-any: using haskell98-1.0.1.0 Dependency ghc>=6.8.2&&<6.9: using ghc-6.8.3 Dependency filepath-any: using filepath-1.1.0.0 Dependency directory-any: using directory-1.0.0.1 Dependency pretty-any: using pretty-1.0.0.0 Dependency containers-any: using containers-0.1.0.2 Dependency array-any: using array-0.1.0.0 Using compiler: ghc-6.8.3 Using install prefix: /usr/local Binaries installed in: /usr/local/bin Libraries installed in: /usr/local/lib/haddock-2.1.0/ghc-6.8.3 Private binaries installed in: /usr/local/libexec Data files installed in: /usr/local/share/haddock-2.1.0 Documentation installed in: /usr/local/share/doc/haddock-2.1.0 No alex found Using ar found on system at: /usr/bin/ar No c2hs found No cpphs found No ffihugs found Using ghc version 6.8.3 found on system at: /usr/bin/ghc Using ghc-pkg version 6.8.3 found on system at: /usr/bin/ghc-pkg No greencard found No haddock found No happy found No hmake found Using hsc2hs version 0.66-ghc found on system at: /usr/bin/hsc2hs No hscolour found No hugs found No jhc found Using ld found on system at: /usr/bin/ld No nhc98 found No pfesetup found Using pkg-config version 0.23 found on system at: /opt/local/bin/pkg-config Using ranlib found on system at: /usr/bin/ranlib Using tar found on system at: /usr/bin/tar Creating dist/build (and its parents) Creating dist/build/autogen (and its parents) Preprocessing library haddock-2.1.0... Preprocessing executables for haddock-2.1.0... Building haddock-2.1.0... Building library... Creating dist/build (and its parents) Creating dist/build (and its parents) /usr/bin/ghc -package-name haddock-2.1.0 --make -hide-all-packages -i -idist/build/autogen -idist/build -isrc -Idist/build -odir dist/build -hidir dist/build -stubdir dist/build -package base-3.0.2.0 -package haskell98-1.0.1.0 -package ghc-6.8.3 -package filepath-1.1.0.0 -package directory-1.0.0.1 -package pretty-1.0.0.0 -package containers-0.1.0.2 -package array-0.1.0.0 -O -XCPP -XPatternGuards -XDeriveDataTypeable -XPatternSignatures -XMagicHash Distribution.Haddock Haddock.Types Haddock.InterfaceFile Haddock.Exception Linking... /usr/bin/ar q dist/build/libHShaddock-2.1.0.a dist/build/Distribution/Haddock.o dist/build/Haddock/Types.o dist/build/Haddock/InterfaceFile.o dist/build/Haddock/Exception.o ar: creating archive dist/build/libHShaddock-2.1.0.a /usr/bin/ld -x -r -o dist/build/HShaddock-2.1.0.o.tmp dist/build/Distribution/Haddock.o dist/build/Haddock/Types.o dist/build/Haddock/InterfaceFile.o dist/build/Haddock/Exception.o Building executable: haddock... Creating dist/build/haddock (and its parents) Creating dist/build/haddock/haddock-tmp (and its parents) Creating dist/build/haddock/haddock-tmp (and its parents) /usr/bin/ghc -o dist/build/haddock/haddock --make -hide-all-packages -i -idist/build/autogen -idist/build/haddock/haddock-tmp -isrc -Idist/build/haddock/haddock-tmp -odir dist/build/haddock/haddock-tmp -hidir dist/build/haddock/haddock-tmp -stubdir dist/build/haddock/haddock-tmp -package base-3.0.2.0 -package haskell98-1.0.1.0 -package ghc-6.8.3 -package filepath-1.1.0.0 -package directory-1.0.0.1 -package pretty-1.0.0.0 -package containers-0.1.0.2 -package array-0.1.0.0 -O -funbox-strict-fields -O2 -XCPP -XPatternGuards -XDeriveDataTypeable -XPatternSignatures -XMagicHash src/Main.hs [ 8 of 24] Compiling Paths_haddock ( dist/build/autogen/Paths_haddock.hs, dist/build/haddock/haddock-tmp/Paths_haddock.o ) [15 of 24] Compiling Haddock.GHC.Typecheck ( src/Haddock/GHC/Typecheck.hs, dist/build/haddock/haddock-tmp/Haddock/GHC/Typecheck.o ) src/Haddock/GHC/Typecheck.hs:82:4: Constructor `HsModule' should have 7 arguments, but has been given 8 In the pattern: HsModule _ _ _ _ _ mbOpts _ _ In a pattern binding: HsModule _ _ _ _ _ mbOpts _ _ = unLoc parsed In the definition of `mkGhcModule': mkGhcModule (mod, file, checkedMod) dynflags = GhcModule {ghcModule = mod, ghcFilename = file, ghcMbDocOpts = mbOpts, ghcHaddockModInfo = info, ghcMbDoc = mbDoc, ghcGroup = group, ghcMbExports = mbExports, ghcExportedNames = modInfoExports modInfo, ghcNamesInScope = fromJust $ modInfoTopLevelScope modInfo, ghcInstances = modInfoInstances modInfo} where HsModule _ _ _ _ _ mbOpts _ _ = unLoc parsed (group, _, mbExports, mbDoc, info) = renamed (parsed, renamed, _, modInfo) = checkedMod