--- /usr/portage/mail-mta/exim/exim-4.84.ebuild 2014-11-03 13:01:12.000000000 +0000
+++ exim-4.84.ebuild    2014-12-27 06:19:32.827799725 +0000
@@ -115,17 +115,22 @@ src_configure() {
                -e "s:COMPRESS_COMMAND=.*$:COMPRESS_COMMAND=${EPREFIX}/bin/gzip:" \
                src/EDITME > Local/Makefile

+    if use elibc_musl; then
+        sed -e 's/^LIBS = -lnsl/LIBS =/g' \
+        -e 's/^HAVE_ICONV=yes/#HAVE_ICONV=yes/' \
+        -i OS/Makefile-Linux
+    fi
+
        cd Local

        cat >> Makefile <<- EOC
                INFO_DIRECTORY=${EPREFIX}/usr/share/info
                PID_FILE_PATH=${EPREFIX}/run/exim.pid
                SPOOL_DIRECTORY=${EPREFIX}/var/spool/exim
-               HAVE_ICONV=yes
        EOC

        # if we use libiconv, now is the time to tell so
-       use !elibc_glibc && echo "EXTRALIBS_EXIM=-liconv" >> Makefile
+       use !elibc_glibc && use !elibc_musl && echo "EXTRALIBS_EXIM=-liconv" >> Makefile

        # support for IPv6
        if use ipv6; then