I updated my local kernel repository with all recent commits using the following commands- git checkout staging-next git pull After that when I try to compile, I'm getting an error scripts/sign-file.c:20:25: fatal error: openssl/bio.h: No such file or directory #include <openssl/bio.h> ^ compilation terminated. scripts/Makefile.host:91: recipe for target 'scripts/sign-file' failed make[1]: *** [scripts/sign-file] Error 1 Makefile:545: recipe for target 'scripts' failed make: *** [scripts] Error 2 What should I do to fix it? Thanks in advance.