Hi, I get the following error. Does anybody know how to fix it on Mac OS X 10.9.4? Thanks. $ cabal install cabal-install Resolving dependencies... Configuring Cabal-1.20.0.2... Failed to install Cabal-1.20.0.2 Last 10 lines of the build log ( /Users/py/.cabal/logs/Cabal-1.20.0.2.log ): cabal: Error: some packages failed to install: Cabal-1.20.0.2 failed during the configure step. The exception was: user error ( /var/folders/nn/p4t2bp0n0znc79dc77q45y9m0000gn/T/Cabal-1.20.0.2-95493/Cabal-1.20.0.2/Distribution/Simple/Utils.hs:386:31: Warning: In the use of ‘runGenProcess_’ (imported from System.Process.Internals): Deprecated: "Please do not use this anymore, use the ordinary 'System.Process.createProcess'. If you need the SIGINT handling, use delegate_ctlc = True (runGenProcess_ is now just an imperfectly emulated stub that probably duplicates or overrides your own signal handling)." Undefined symbols for architecture x86_64: "_iconv", referenced from: _hs_iconv in libHSbase-4.7.0.1.a(iconv.o) (maybe you meant: _base_GHCziIOziEncodingziIconv_iconvEncoding9_info, _base_GHCziIOziEncodingziIconv_iconvEncoding9_closure , _hs_iconv_open , _base_GHCziIOziEncodingziIconv_iconvEncoding6_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding10_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding7_info , _base_GHCziIOziEncodingziIconv_iconvEncoding2_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding2_info , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc_info , _hs_iconv_close , _base_GHCziIOziEncodingziIconv_iconvEncoding3_info , _base_GHCziIOziEncodingziIconv_iconvEncoding3_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding4_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding7_closure , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc1_closure , _hs_iconv , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding8_info , _base_GHCziIOziEncodingziIconv_iconvEncoding8_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding10_info , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc1_info , _base_GHCziIOziEncodingziIconv_iconvEncoding6_info ) "_iconv_close", referenced from: _hs_iconv_close in libHSbase-4.7.0.1.a(iconv.o) (maybe you meant: _hs_iconv_close) "_iconv_open", referenced from: _hs_iconv_open in libHSbase-4.7.0.1.a(iconv.o) (maybe you meant: _hs_iconv_open) "_locale_charset", referenced from: _localeEncoding in libHSbase-4.7.0.1.a(PrelIOUtils.o) ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) ) cabal-install-1.20.0.3 depends on Cabal-1.20.0.2 which failed to install. -- Regards, Peng