Today I wanted to build fvwm (lack of xft and png support) from PKGs. I followed the PkgSrc wiki and CVSed the src directories to my /usr folder.
then I started inside fvwm directory.
it went well for a while but it halted with the error saying libffi 3.2 is already installed and you can't install libffi 3.3.
Don't mix pkgs from different branches ;)
Which, repo is pkgin pulling its binaries from?
Which branch did you checkout?
johnb Pkgin 2019Q4
That's your problem ;)
You should use the same branch.