Hi Claus, I've installed the vimball, and it spit a few errors at me. In particular, it couldn't find the haddock documentation directory. A quick look at haskell_doc.vim shows that it should autodetect the directory. However, for some reason my ghc-pkg command returns the doc directory twice: $ ghc-pkg field base haddock-html haddock-html: /usr/local/ghc-6.10.1/share/doc/ghc/libraries/base haddock-html: /usr/local/ghc-6.10.1/share/doc/ghc/libraries/base The haskell_doc.vim contains the following line, which seems to deal with multiple lines: let field = substitute(system(g:ghc_pkg . ' field base haddock-html'),'\n','','') However, this simply concats the lines, which obviously makes a mess of the output and makes the detection fail. I've made things work by throwing away everything except for the first line, by replacing the above line with: let field = substitute(system(g:ghc_pkg . ' field base haddock-html'),'\n.*','','') This solution works for me, though it might be better to iterate all lines and try each of them in turn, for the case that ghc-pkg returns different paths? I can't really think of a case why this would be needed, though. Gr. Matthijs