You have modified or added at least one vcpkg.json where you should check the "license" field. If you feel able to do so, please consider adding a "license" field to the following files: ports/libmad/vcpkg.json Valid values for the license field can be found at https://learn.microsoft.com/en-us/vcpkg/reference/vcpkg-json#license If you feel able to do so, please consider replacing the deprecated license identifiers in the following files: ports/kerbal/vcpkg.json (has deprecated license "GPL-3.0") ports/libnick/vcpkg.json (has deprecated license "GPL-3.0") Deprecated and non deprecated license identifiers can be found at https://spdx.org/licenses/#deprecated