--- ghc-6.10.4/libraries/unix/configure.orig 2010-12-15 00:23:35.000000000 +1300 +++ ghc-6.10.4/libraries/unix/configure 2010-12-15 00:23:44.000000000 +1300 @@ -4318,7 +4318,7 @@ -for ac_header in libutil.h pty.h utmp.h +for ac_header in libutil.h pty.h do as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then