Thanks so very much Axel and Ivan. You were both absolutely correct and I can compile Glade apps now fine. Great help! The tricky part (for me) would have been looking at the error from cabal install glade: "setup.exe: The pkg-config package libglade-2.0 version >=2.0.0 is required but it could not be found." and determining that the problem was that libglade-2.0.pc needed the edit you described, but I made the edit and it all works now. -- Peter And I guess I don't need these edits to cabal/config after all: -- -------------------------------- -- extra-include-dirs: -- extra-lib-dirs: extra-include-dirs: H:\proc\tools\Gtk+\include extra-lib-dirs: H:\proc\tools\Gtk+\lib -- -------------------------------- New "cabal install glade" after libglade-2.0.pc edit: H:\proc\dev\cmd>pkg-config --modversion libglade-2.0 2.6.4 H:\proc\dev\cmd>cabal install glade Resolving dependencies... C:\DOCUME~1\pschmitz\LOCALS~1\Temp\glade-0.11.12236\glade-0.11.1\Gtk2HsSetup.hs:25: warning: #warning Setup.hs is guessing the version of Cabal. If compilation of Setup.hs fails use -DCABAL_VERSION_MINOR=x for Cabal version 1.x.0 when building (prefixed by --ghc-option= when using the 'cabal' command) [1 of 2] Compiling Gtk2HsSetup ( C:\DOCUME~1\pschmitz\LOCALS~1\Temp\glade-0.11.12236\glade-0.11.1\Gtk2HsSetup.hs, C:\DOCUME~1\pschmitz\LOCALS~1\Temp\glade-0.11.12236\glade-0.11.1\dist\setup\Gtk2HsSetup.o ) [2 of 2] Compiling Main ( C:\DOCUME~1\pschmitz\LOCALS~1\Temp\glade-0.11.12236\glade-0.11.1\Setup.hs, C:\DOCUME~1\pschmitz\LOCALS~1\Temp\glade-0.11.12236\glade-0.11.1\dist\setup\Main.o ) Linking C:\DOCUME~1\pschmitz\LOCALS~1\Temp\glade-0.11.12236\glade-0.11.1\dist\setup\setup.exe ... Configuring glade-0.11.1... Preprocessing library glade-0.11.1... Building glade-0.11.1... [1 of 2] Compiling Graphics.UI.Gtk.Glade.Types ( dist\build\Graphics\UI\Gtk\Glade\Types.hs, dist\build\Graphics\UI\Gtk\Glade\Types.o ) [2 of 2] Compiling Graphics.UI.Gtk.Glade ( dist\build\Graphics\UI\Gtk\Glade.hs, dist\build\Graphics\UI\Gtk\Glade.o ) Registering glade-0.11.1... Installing library in H:\proc\tools\cabal\glade-0.11.1\ghc-6.12.1 Registering glade-0.11.1... H:\proc\dev\cmd>