Fix debci by altering available_models Quoting Niko, Config::Model::Lister::available_models() argument needs to be different when running under autopkgtest to force looking in @INC instead of lib/. Basing it on the AUTOPKGTEST_TMP environment variable is probably the best choice. . So @INC is used when AUTOPKGTEST_TMP is true-ish. Its value is not verified.