Hello, After a moderate struggle with getting gtk2hs to install on Windows, I tried to install Chart and got a linker message saying "_cairo_image_surface_get_data" was missing. After another struggle I figured that if I launch ghci -lcairo-2 then everything works fine. I tried patching cairo.cabal by adding this line: extra-libraries: cairo-2 and reinstalling cairo. This helped, I could install Chart without problems. My question is: Should this line be added to cairo.cabal, or should everything have worked fine in some other magical way, but did not, because of some other error? How can I diagnose what's wrong? How is "cabal install" generally supposed to find that a dll is needed, if I don't write it down in the extra-libraries field? -- Eugene Kirpichov Principal Engineer, Mirantis Inc. http://www.mirantis.com/ Editor, http://fprog.ru/