librsvg provides a cache file for gdk-pixbuf modules: /gnu/store/...librsvg-2.40.2/lib/gdk-pixbuf-2.0/2.0.10/loaders.cache
However, the cache does not include the SVG module created by librsvg itself. The full cache should be generated with: /gnu/store/...-gdk-pixbuf-2.28.2/bin/gdk-pixbuf-query-loaders \ /gnu/store/...-librsvg-2.40.2/lib/gdk-pixbuf-2.0/2.0.10/loaders/libpixbufloader-svg.so \ /gnu/store/...-gdk-pixbuf-2.28.2/lib/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-*.so Regards, Fede