ppp ftbfs in cosmic

https://launchpadlibrarian.net/418304805/buildlog_ubuntu-cosmic-amd64.ppp_2.4.7-2+3ubuntu1_BUILDING.txt.gz

cc -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,-E -o pppd main.o magic.o fsm.o lcp.o ipcp.o upap.o chap-new.o ccp.o ecp.o auth.o options.o demand.o utils.o sys-linux.o ipxcp.o tty.o eap.o chap-md5.o session.o chap_ms.o eap-tls.o pppcrypt.o multilink.o tdb.o spinlock.o ipv6cp.o eui64.o cbcp.o -lcrypto -lssl -lcrypt -lutil -lpam -ldl -ldl -lpcap \
 -Wl,-soname,pppd.so.2.4.7
/usr/bin/ld: pppcrypt.o: in function `DesSetkey':
./pppd/pppcrypt.c:122: undefined reference to `setkey'
/usr/bin/ld: pppcrypt.o: in function `DesEncrypt':
./pppd/pppcrypt.c:137: undefined reference to `encrypt'
/usr/bin/ld: pppcrypt.o: in function `DesDecrypt':
./pppd/pppcrypt.c:153: undefined reference to `encrypt'
collect2: error: ld returned 1 exit status
make[3]: *** [Makefile:227: pppd] Error 1
make[3]: Leaving directory '/<<PKGBUILDDIR>>/pppd'
make[2]: *** [Makefile:15: all] Error 2
make[2]: Leaving directory '/<<PKGBUILDDIR>>'
dh_auto_build: make -j4 "COPTS=-g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2" "LDOPTS=-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now" returned exit code 2
make[1]: *** [debian/rules:81: override_dh_auto_build-arch] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:35: build] Error 2