Hi, I posted this to the HAppS discussion group, but maybe somebody is able to answer in the Cafe, at least where this unresolved symbol belongs to. It looks like the same problem was discussed earlier related to GHC 6.7, but I got this problem right now, compiling HPaste with HAppS (using SearchPath). The linker message is: =================================== During interactive linking, GHCi couldn't find the following symbol: stg_uncheckedShiftRL64 This may be due to you not asking GHCi to load extra object files, archives or DLLs needed by your current session. Restart GHCi, specifying the missing library using the -L/path/to/object/dir and - lmissinglibname flags, or simply by naming the relevant files on the GHCi command line. Alternatively, this link failure might indicate a bug in GHCi. If you suspect the latter, please send a bug report to: glasgow-haskell-b...@haskell.org =================================== Output from ghc-pkg -l: =================================== /home2/dima/install//lib/ghc-6.8.2/package.conf: Cabal-1.2.3.0, array-0.1.0.0, base-3.0.1.0, binary-0.4.1, bytestring-0.9.0.1, containers-0.1.0.1, directory-1.0.0.0, filepath-1.1.0.0, (ghc-6.8.2), haskell-src-1.0.1.1, haskell98-1.0.1.0, hpc-0.5.0.0, hscolour-1.6, html-1.0.1.1, mtl-1.1.0.0, network-2.1.0.0, old-locale-1.0.0.0, old- time-1.0.0.0, packedstring-0.1.0.0, parsec-2.1.0.0, pretty-1.0.0.0, process-1.0.0.0, random-1.0.0.0, readline-1.0.1.0, regex-base-0.72.0.1, regex-compat-0.71.0.1, regex-posix-0.72.0.2, rts-1.0, stm-2.1.1.0, template-haskell-2.2.0.0, unix-2.3.0.0, xhtml-3000.0.2.1, zlib-0.4.0.1 =================================== To save time I compiled only GHC without extralibs, and later installed packages that were msissng during compilation from extralibs or hackage. Are there any modules shown whose versions raise any suspicions? Thanks.