Alpine 3.22 split the libgmp static archive out of gmp-dev into a separate gmp-static subpackage. Without it, 'crystal build --static' fails with 'ld: cannot find -lgmp ... have you installed the static version of the gmp library'. Verified by inspecting the contents of gmp-dev on crystallang/crystal:1.20.2-alpine (only .so present, no .a). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>