Build Log: conf-libpcre.2

Processing: [default: loading data] [WARNING] These additional system packages are required, but not available on your system: libpcre3-dev [conf-libpcre: pkg-config libpcre] + /usr/bin/pkg-config "--print-errors" "--exists" "libpcre" (CWD=/home/opam/.opam/default/.opam-switch/build/conf-libpcre.2) - Package libpcre was not found in the pkg-config search path. - Perhaps you should add the directory containing `libpcre.pc' - to the PKG_CONFIG_PATH environment variable - Package 'libpcre', required by 'virtual:world', not found [ERROR] The compilation of conf-libpcre.2 failed at "pkg-config --print-errors --exists libpcre". build failed...