The current version of xmonad in darcs doesn't compile for me: $ darcs get http://code.haskell.org/xmonad Copying patch 694 of 694... done! Applying patch 694 of 694... done. Finished getting. $ cd xmonad/ $ chmod u+x Setup.lhs $ ./Setup.lhs configure Configuring xmonad-0.3... configure: Dependency base>=2.0: using base-2.1.1 configure: Dependency X11>=1.2.1: using X11-1.2.1 configure: Dependency X11-extras>=0.3: using X11-extras-0.3 configure: Dependency mtl>=1.0: using mtl-1.0.1 configure: Dependency unix>=1.0: using unix-2.1 configure: Using install prefix: /usr/local configure: Binaries installed in: /usr/local/bin configure: Libraries installed in: /usr/local/lib/xmonad-0.3/ghc-6.6.1 configure: Private binaries installed in: /usr/local/libexec configure: Data files installed in: /usr/local/share/xmonad-0.3 configure: Using compiler: /home/dbenbenn/apps/bin/ghc configure: Compiler flavor: GHC configure: Compiler version: 6.6.1 configure: Using package tool: /home/dbenbenn/apps/bin/ghc-pkg configure: Using ar found on system at: /usr/bin/ar configure: No haddock found configure: No pfesetup found configure: Using ranlib found on system at: /usr/bin/ranlib configure: Using runghc found on system at: /home/dbenbenn/apps/bin/runghc configure: No runhugs found configure: No happy found configure: No alex found configure: Using hsc2hs: /home/dbenbenn/apps/bin/hsc2hs configure: No c2hs found configure: No cpphs found configure: No greencard found $ ./Setup.lhs build Preprocessing executables for xmonad-0.3... Building xmonad-0.3... [1 of 6] Compiling StackSet ( StackSet.hs, dist/build/xmonad/xmonad-tmp/StackSet.o ) StackSet.hs:234:0: Warning: Pattern match(es) are non-exhaustive In the definition of `view': Patterns not matched: _ _ [2 of 6] Compiling XMonad ( XMonad.hs, dist/build/xmonad/xmonad-tmp/XMonad.o ) [3 of 6] Compiling Config[boot] ( Config.hs-boot, nothing ) [4 of 6] Compiling Operations ( Operations.hs, dist/build/xmonad/xmonad-tmp/Operations.o ) [5 of 6] Compiling Config ( Config.hs, dist/build/xmonad/xmonad-tmp/Config.o ) [6 of 6] Compiling Main ( Main.hs, dist/build/xmonad/xmonad-tmp/Main.o ) Main.hs:258:7: Not in scope: data constructor `PropertyEvent' Main.hs:258:42: Not in scope: `ev_atom' Maybe a dependency is missing from the configure step? Any ideas? I was able to compile from darcs two weeks ago.