Hi, I am with my new Ubuntu Trusty box. I have installed ghc by apt-get. Then I wanted to build ghc from git to upgrade to 7.8.3. I did following commands. I tried 'make clean', or reget the source. No luck yet. $ git clone --recursive git://git.haskell.org/ghc.git $ ./sync-all -r git://git.haskell.org remote set-url origin $ git checkout ghc-7.8.3-release $ ./sync-all get $ rm -r libraries/time # as prompted by sync-all $ ./sync-all get $ ./boot $ ./configure $ make ===--- building phase 0 make -r --no-print-directory -f ghc.mk phase=0 phase_0_builds make[1]: Nothing to be done for `phase_0_builds'. ===--- building phase 1 make -r --no-print-directory -f ghc.mk phase=1 phase_1_builds "inplace/bin/ghc-cabal" check libraries/haskell98 "inplace/bin/ghc-cabal" configure libraries/haskell98 dist-install "" --with-ghc="/home/local/ANT/shida/src/git/ghc/inplace/bin/ghc-stage1" --with-ghc-pkg="/home/local/ANT/shida/src/git/ghc/inplace/bin/ghc-pkg" --disable-library-for-ghci --enable-library-vanilla --enable-library-profiling --enable-shared --configure-option=CFLAGS=" -fno-stack-protector " --configure-option=LDFLAGS=" " --configure-option=CPPFLAGS=" " --gcc-options=" -fno-stack-protector " --with-gcc="/usr/bin/gcc" --with-ld="/usr/bin/ld" --configure-option=--with-cc="/usr/bin/gcc" --with-ar="/usr/bin/ar" --with-ranlib="/usr/bin/ranlib" --with-alex="/usr/bin/alex" --with-happy="/usr/bin/happy" Configuring haskell98-2.0.0.4... ghc-cabal: At least the following dependencies are missing: base ==4.8.* make[1]: *** [libraries/haskell98/dist-install/package-data.mk] Error 1 make: *** [all] Error 2 -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com.