Resolving dependencies... Configuring stm-2.4.4.1... Configuring mtl-2.2.1... Building stm-2.4.4.1... Building mtl-2.2.1... Installed stm-2.4.4.1 Installed mtl-2.2.1 Configuring HsSVN-0.4.3... Failed to install HsSVN-0.4.3 Build log ( /home/builder/.cabal/logs/HsSVN-0.4.3.log ): cabal: Entering directory '/tmp/cabal-tmp-21908/HsSVN-0.4.3' Configuring HsSVN-0.4.3... configure: WARNING: Unrecognized options: --with-compiler checking for gcc... /usr/bin/gcc checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether /usr/bin/gcc accepts -g... yes checking for /usr/bin/gcc option to accept ISO C89... none needed checking how to run the C preprocessor... /usr/bin/gcc -E checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking svn_error.h usability... no checking svn_error.h presence... no checking for svn_error.h... no configure: error: SVN headers are required. Hint: EXTRA_CPPFLAGS cabal: Leaving directory '/tmp/cabal-tmp-21908/HsSVN-0.4.3' cabal: Error: some packages failed to install: HsSVN-0.4.3 failed during the configure step. The exception was: ExitFailure 1