Hi, Using Guix 55685e4, I get:
--8<---------------cut here---------------start------------->8--- $ guix build -S --no-substitutes crypto++ The following derivations will be built: /gnu/store/ygm0vj16131ki4dp19g07r9qva96na6z-cryptopp840.zip.drv /gnu/store/ak8srnbal72rvkl646j5p9ylf39m60md-unzip-6.0.drv /gnu/store/ckxh9dx7nf9mx0vkr6a7y8biwxisgqpv-unzip60.tar.xz.drv /gnu/store/ss5klqhzwavdy1r7xr5x4fpiwabv74gc-unzip60.tar.gz.drv /gnu/store/h43wi0jqkg13dsmc51d3bjmbzwrvgpq5-zipbomb-cryptopp840.zip.drv building /gnu/store/h43wi0jqkg13dsmc51d3bjmbzwrvgpq5-zipbomb-cryptopp840.zip.drv... Starting download of /gnu/store/8dvs6mdlkgfjpyyislj7mhym329z53ww-zipbomb-cryptopp840.zip >From https://cryptopp.com/cryptopp840.zip... In procedure connect*: No route to host Starting download of /gnu/store/8dvs6mdlkgfjpyyislj7mhym329z53ww-zipbomb-cryptopp840.zip >From >https://ci.guix.gnu.org/file/zipbomb-cryptopp840.zip/sha256/16kvfm11xv7j9a3yykzysjgw38a9b7lnc5n5x5h82g395k6ybxf0... download failed "https://ci.guix.gnu.org/file/zipbomb-cryptopp840.zip/sha256/16kvfm11xv7j9a3yykzysjgw38a9b7lnc5n5x5h82g395k6ybxf0" 404 "Not Found" Starting download of /gnu/store/8dvs6mdlkgfjpyyislj7mhym329z53ww-zipbomb-cryptopp840.zip >From >https://tarballs.nixos.org/sha256/16kvfm11xv7j9a3yykzysjgw38a9b7lnc5n5x5h82g395k6ybxf0... download failed "https://tarballs.nixos.org/sha256/16kvfm11xv7j9a3yykzysjgw38a9b7lnc5n5x5h82g395k6ybxf0" 404 "Not Found" Starting download of /gnu/store/8dvs6mdlkgfjpyyislj7mhym329z53ww-zipbomb-cryptopp840.zip >From >https://archive.softwareheritage.org/api/1/content/sha256:c0f5e5cd2c693c8160e9c51666e95949a1c19fd4fe4fef874af2ec1e42757b9a/raw/... download failed "https://archive.softwareheritage.org/api/1/content/sha256:c0f5e5cd2c693c8160e9c51666e95949a1c19fd4fe4fef874af2ec1e42757b9a/raw/" 404 "Not Found" failed to download "/gnu/store/8dvs6mdlkgfjpyyislj7mhym329z53ww-zipbomb-cryptopp840.zip" from "https://cryptopp.com/cryptopp840.zip" builder for `/gnu/store/h43wi0jqkg13dsmc51d3bjmbzwrvgpq5-zipbomb-cryptopp840.zip.drv' failed to produce output path `/gnu/store/8dvs6mdlkgfjpyyislj7mhym329z53ww-zipbomb-cryptopp840.zip' build of /gnu/store/h43wi0jqkg13dsmc51d3bjmbzwrvgpq5-zipbomb-cryptopp840.zip.drv failed View build log at '/var/log/guix/drvs/h4/3wi0jqkg13dsmc51d3bjmbzwrvgpq5-zipbomb-cryptopp840.zip.drv.bz2'. cannot build derivation `/gnu/store/ygm0vj16131ki4dp19g07r9qva96na6z-cryptopp840.zip.drv': 1 dependencies couldn't be built guix build: error: build of `/gnu/store/ygm0vj16131ki4dp19g07r9qva96na6z-cryptopp840.zip.drv' failed --8<---------------cut here---------------end--------------->8--- The easy fix is to replace by <https://github.com/weidai11/cryptopp>; keeping url-fetch or replacing by git-fetch. All the best, simon