pkgsrc bootstrap fails on FreeBSD

The command I used:

./bootstrap --prefix=/test --compiler=clang --unprivileged

The error message:

cc -L/test/pkgsrc/bootstrap/work/libnbcompat -L../lib -o pkg_create main.o perform.o pl.o util.o build.o -linstall /test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a -lnbcompat
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_md5init':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:138: undefined reference to `_libmd_MD5Init'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_md5update':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:146: undefined reference to `_libmd_MD5Update'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_md5final':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:153: undefined reference to `_libmd_MD5Final'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_ripemd160init':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:353: undefined reference to `_libmd_RIPEMD160_Init'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_ripemd160update':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:361: undefined reference to `_libmd_RIPEMD160_Update'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_ripemd160final':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:368: undefined reference to `_libmd_RIPEMD160_Final'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_sha1init':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:519: undefined reference to `_libmd_SHA1_Init'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_sha1update':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:527: undefined reference to `_libmd_SHA1_Update'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_sha1final':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:534: undefined reference to `_libmd_SHA1_Final'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_sha256init':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:782: undefined reference to `_libmd_SHA256_Init'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_sha256update':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:790: undefined reference to `_libmd_SHA256_Update'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_sha256final':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:797: undefined reference to `_libmd_SHA256_Final'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_sha512init':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:1276: undefined reference to `_libmd_SHA512_Init'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_sha512update':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:1284: undefined reference to `_libmd_SHA512_Update'
/test/pkgsrc/bootstrap/work/libarchive/.libs/libarchive.a(archive_digest.o): In function `__archive_sha512final':
/test/pkgsrc/bootstrap/work/libarchive/libarchive/archive_digest.c:1291: undefined reference to `_libmd_SHA512_Final'
cc: error: linker command failed with exit code 1 (use -v to see invocation)
*** [pkg_create] Error code 1

bmake[1]: stopped in /test/pkgsrc/bootstrap/work/pkg_install/create
1 error

bmake[1]: stopped in /test/pkgsrc/bootstrap/work/pkg_install/create
*** [all] Error code 1

bmake: stopped in /test/pkgsrc/bootstrap/work/pkg_install
1 error

bmake: stopped in /test/pkgsrc/bootstrap/work/pkg_install
===> exited with status 2
aborted.