Apache 2.0.44 make failing with-mpm=worker

I ran a successful make with the default prefork MPM. I've modified
the config.nice file to overrid with the worker MPM instead. Now make
is failing.
Can someone explain why?

/bin/sh /usr/local/apache2.0.44/httpd-2.0.44/srclib/apr/libtool
--silent --mode=link gcc -g -O2 -pthread -DLINUX=2 -D_REENTRANT
-D_XOPEN_SOURCE=500 -D_BSD_SOURCE -D_SVID_SOURCE -D_GNU_SOURCE
-DAP_HAVE_DESIGNATED_INITIALIZER
-I/usr/local/apache2.0.44/httpd-2.0.44/srclib/apr/include
-I/usr/local/apache2.0.44/httpd-2.0.44/srclib/apr-util/include -I.
-I/usr/local/apache2.0.44/httpd-2.0.44/os/unix
-I/usr/local/apache2.0.44/httpd-2.0.44/server/mpm/worker
-I/usr/local/apache2.0.44/httpd-2.0.44/modules/http
-I/usr/local/apache2.0.44/httpd-2.0.44/modules/filters
-I/usr/local/apache2.0.44/httpd-2.0.44/modules/proxy
-I/usr/local/apache2.0.44/httpd-2.0.44/include -I/usr/include/openssl
-I/usr/local/apache2.0.44/httpd-2.0.44/modules/dav/main
-export-dynamic -o httpd modules.lo modules/aaa/mod_access.la
modules/aaa/mod_auth.la modules/filters/mod_include.la
modules/loggers/mod_log_config.la modules/metadata/mod_env.la
modules/metadata/mod_setenvif.la modules/ssl/mod_ssl.la
modules/http/mod_http.la modules/http/mod_mime.la
modules/generators/mod_status.la modules/generators/mod_asis.la
modules/generators/mod_cgid.la modules/mappers/mod_negotiation.la
modules/mappers/mod_dir.la modules/mappers/mod_userdir.la
modules/mappers/mod_alias.la modules/mappers/mod_so.la
server/mpm/worker/libworker.la server/libmain.la os/unix/libos.la
-lssl -lcrypto /usr/local/apache2.0.44/httpd-2.0.44/srclib/pcre/libpcre.la
/usr/local/apache2.0.44/httpd-2.0.44/srclib/apr-util/libaprutil-0.la
-lgdbm -ldb -lexpat /usr/local/apache2.0.44/httpd-2.0.44/srclib/apr/libapr-0.la
-lm -lcrypt -lnsl -ldl
server/.libs/libmain.al(mpm_common.lo): In function `ap_mpm_pod_open':
/usr/local/apache2.0.44/httpd-2.0.44/server/mpm_common.c:398: multiple
definition of `ap_mpm_pod_open'
server/mpm/worker/.libs/libworker.al(pod.lo):/usr/local/apache2.0.44/httpd-2.0.44/server/mpm/worker/pod.c:66:
first defined here
/usr/bin/ld: Warning: size of symbol `ap_mpm_pod_open' changed from 62
to 114 in server/.libs/libmain.al(mpm_common.lo)
server/.libs/libmain.al(mpm_common.lo): In function
`ap_mpm_pod_check':
/usr/local/apache2.0.44/httpd-2.0.44/server/mpm_common.c:417: multiple
definition of `ap_mpm_pod_check'
server/mpm/worker/.libs/libworker.al(pod.lo):/usr/local/apache2.0.44/httpd-2.0.44/server/mpm/worker/pod.c:83:
first defined here
/usr/bin/ld: Warning: size of symbol `ap_mpm_pod_check' changed from
75 to 59 in server/.libs/libmain.al(mpm_common.lo)
server/.libs/libmain.al(mpm_common.lo): In function
`ap_mpm_pod_close':
/usr/local/apache2.0.44/httpd-2.0.44/server/mpm_common.c:436: multiple
definition of `ap_mpm_pod_close'
server/mpm/worker/.libs/libworker.al(pod.lo):/usr/local/apache2.0.44/httpd-2.0.44/server/mpm/worker/pod.c:105:
first defined here
/usr/bin/ld: Warning: size of symbol `ap_mpm_pod_close' changed from
43 to 57 in server/.libs/libmain.al(mpm_common.lo)
server/.libs/libmain.al(mpm_common.lo): In function
`ap_mpm_pod_signal':
/usr/local/apache2.0.44/httpd-2.0.44/server/mpm_common.c:528: multiple
definition of `ap_mpm_pod_signal'
server/mpm/worker/.libs/libworker.al(pod.lo):/usr/local/apache2.0.44/httpd-2.0.44/server/mpm/worker/pod.c:137:
first defined here
/usr/bin/ld: Warning: size of symbol `ap_mpm_pod_signal' changed from
12 to 41 in server/.libs/libmain.al(mpm_common.lo)
server/.libs/libmain.al(mpm_common.lo): In function
`ap_mpm_pod_killpg':
/usr/local/apache2.0.44/httpd-2.0.44/server/mpm_common.c:540: multiple
definition of `ap_mpm_pod_killpg'
server/mpm/worker/.libs/libworker.al(pod.lo):/usr/local/apache2.0.44/httpd-2.0.44/server/mpm/worker/pod.c:142:
first defined here
/usr/bin/ld: Warning: size of symbol `ap_mpm_pod_killpg' changed from
56 to 53 in server/.libs/libmain.al(mpm_common.lo)
collect2: ld returned 1 exit status
make[1]: *** [httpd] Error 1
make[1]: Leaving directory `/usr/local/apache2.0.44/httpd-2.0.44'
make: *** [all-recursive] Error 1

Thanks,
Ed