diff --git a/pkgs/development/libraries/libmilter/sharedlib.patch b/pkgs/development/libraries/libmilter/sharedlib.patch
index bbc69a516ff..e0b1e6992e1 100644
--- a/pkgs/development/libraries/libmilter/sharedlib.patch
+++ b/pkgs/development/libraries/libmilter/sharedlib.patch
@@ -16,28 +16,29 @@ diff -Nru sendmail-8.14.3.orig/devtools/M4/UNIX/milterlibrary.m4 sendmail-8.14.3
 +#
 +divert(0)dnl
 +include(confBUILDTOOLSDIR`/M4/'bldM4_TYPE_DIR`/links.m4')dnl
++define(`confSOEXT', ifdef(`confSOEXT', `confSOEXT', `so'))dnl
 +bldLIST_PUSH_ITEM(`bldC_PRODUCTS', bldCURRENT_PRODUCT)dnl
-+bldPUSH_TARGET(bldCURRENT_PRODUCT`.so' bldCURRENT_PRODUCT`.a')dnl
++bldPUSH_TARGET(bldCURRENT_PRODUCT`.'confSOEXT bldCURRENT_PRODUCT`.a')dnl
 +bldPUSH_INSTALL_TARGET(`install-'bldCURRENT_PRODUCT)dnl
 +bldPUSH_CLEAN_TARGET(bldCURRENT_PRODUCT`-clean')dnl
 +
 +include(confBUILDTOOLSDIR`/M4/'bldM4_TYPE_DIR`/defines.m4')
 +divert(bldTARGETS_SECTION)
-+bldCURRENT_PRODUCT.so: ${BEFORE} ${bldCURRENT_PRODUCT`OBJS'}
-+	${CCLINK} ${LDOPTS_SO} -o bldCURRENT_PRODUCT.so -Wl,confSONAME,bldCURRENT_PRODUCT.so.${MILTER_SOVER} ${bldCURRENT_PRODUCT`OBJS'} -lc ${LIBS}
++bldCURRENT_PRODUCT`.'confSOEXT: ${BEFORE} ${bldCURRENT_PRODUCT`OBJS'}
++	${CCLINK} ${LDOPTS_SO} -o bldCURRENT_PRODUCT.confSOEXT ifdef(`confSONAME',`-Wl,confSONAME,bldCURRENT_PRODUCT.confSOEXT.${MILTER_SOVER}') ${bldCURRENT_PRODUCT`OBJS'} -lc ${LIBS}
 +bldCURRENT_PRODUCT.a: ${BEFORE} ${bldCURRENT_PRODUCT`OBJS'}
 +	${AR} ${AROPTS} bldCURRENT_PRODUCT.a ${bldCURRENT_PRODUCT`OBJS'}
 +	${RANLIB} ${RANLIBOPTS} bldCURRENT_PRODUCT.a
 +ifdef(`bldLINK_SOURCES', `bldMAKE_SOURCE_LINKS(bldLINK_SOURCES)')
 +
-+install-`'bldCURRENT_PRODUCT: bldCURRENT_PRODUCT.so bldCURRENT_PRODUCT.a
++install-`'bldCURRENT_PRODUCT: bldCURRENT_PRODUCT.confSOEXT bldCURRENT_PRODUCT.a
 +ifdef(`bldINSTALLABLE', `	ifdef(`confMKDIR', `if [ ! -d "${DESTDIR}${bldINSTALL_DIR`'LIBDIR}" ]; then confMKDIR -p "${DESTDIR}${bldINSTALL_DIR`'LIBDIR}"; else :; fi ')
-+	${INSTALL} -c bldCURRENT_PRODUCT.so "${DESTDIR}${LIBDIR}/bldCURRENT_PRODUCT.so.${MILTER_SOVER}"
-+	${LN} ${LNOPTS} bldCURRENT_PRODUCT.so.${MILTER_SOVER} "${DESTDIR}${LIBDIR}/bldCURRENT_PRODUCT.so"
++	${INSTALL} -c bldCURRENT_PRODUCT.confSOEXT "${DESTDIR}${LIBDIR}/bldCURRENT_PRODUCT.confSOEXT.${MILTER_SOVER}"
++	${LN} ${LNOPTS} bldCURRENT_PRODUCT.confSOEXT.${MILTER_SOVER} "${DESTDIR}${LIBDIR}/bldCURRENT_PRODUCT.confSOEXT"
 +	${INSTALL} -c bldCURRENT_PRODUCT.a "${DESTDIR}${LIBDIR}"')
 +
 +bldCURRENT_PRODUCT-clean:
-+	rm -f ${OBJS} bldCURRENT_PRODUCT.so bldCURRENT_PRODUCT.a ${MANPAGES}
++	rm -f ${OBJS} bldCURRENT_PRODUCT.confSOEXT bldCURRENT_PRODUCT.a ${MANPAGES}
 +
 +divert(0)
 +COPTS+= confCCOPTS_SO