Hi, Here are two small patches. The first one add #:substitutable? to the copy-build system. I don't know how to check if it works as intended though. It's similar to the commit d0050ea8ad1c32d94cf5ba6725a0fc961bb23f38 ("build-system/go: Add #:substitutable? argument.") so normally it shouldn't be an issue, but if someone can double check it it would be best as it would avoid keeping around substitutes of very big sizes. The second patch adds a ZIM file. I'll most likely send more patches to add additional ZIM files packages (about 10) later on. I prefer doing it this way as it avoids having to deal with potential rebases breaking if there is something wrong with my second patch. Denis 'GNUtoo' Carikli (2): build-system/copy: Add #:substitutable? argument. gnu: Add wikipedia_en_all_maxi gnu/local.mk | 1 + gnu/packages/zim-files.scm | 86 ++++++++++++++++++++++++++++++++++++++ guix/build-system/copy.scm | 4 +- 3 files changed, 90 insertions(+), 1 deletion(-) create mode 100644 gnu/packages/zim-files.scm base-commit: c193b5203b31246a6d74270c8086c45851561947 -- 2.38.1