It looks like vigra is mandatory for enblend-enfuse. The README only lists it as mandatory under the windows build instructions, but after uninstalling vigra and building enblend-enfuse without a dependency on vigra, I get the following error:

    checking for cmsCreateTransform in -llcms2... yes
    checking for Vigra import/export-library... no
    configure: error: libvigraimpex is required to compile Enblend.

So enblend-enfuse requires vigra to build.

Do they both have to be in the same repo, or can vigra stay in science and enblend-enfuse in core?