You need at least git-1.6 to install the development version. Please proceed as follows for the main branch: git clone git://gitorious.org/yap-git/mainline.git yap cd yap ./configure Please proceed as follows for the development branch: git clone git://gitorious.org/yap-git/mainline.git yap cd yap git branch --track devel origin/devel git checkout devel git submodule add git://prolog.cs.vu.nl/home/pl/git/chr.git packages/chr git submodule add git://prolog.cs.vu.nl/home/pl/git/clpqr.git packages/clpqr ./configure