was trying to build an raspi3 image for beowulf, according to README + adjusting some files, but kept seeing this error:

 HOSTCC  scripts/extract-cert
scripts/extract-cert.c:21:10: fatal error: openssl/bio.h: No such file or directory
 #include <openssl/bio.h>
          ^~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.host:90: scripts/extract-cert] Error 1

after installing libssl-dev, this error is gone, compilation proceeds normally. so i think this package should be added to dependencies.

host is beowulf/ceres amd64. all other dependencies installed according to instructions.

thx,