3. Installation instructions The installation of p4ck from source can be performed like this: make # requires micmatch_pcre, which requires PCRE-OCaml and PCRE make install # installs in the same directory as ocaml make clean # optional 5. User's guide Typically, the following steps are followed: mkdir p4ck-files && cd p4ck-files # use a fresh directory p4ck -init # download the database (p4ck.lis