Hi Guillaume, sorry about that. Here is another patch. The failed dependencies you mentioned are working now. Another reason why netcdf-parallel-openmpi failed was that I changed the build system previously to cmake. I went back to use the original gnu build system. I changed it to cmake initially because I saw that in Arch Linux's PKGBUILD and I remember having had some problems initially. I guess it was related to the tests I now patched. While at the topic. Do we prefer any build system over the other in general in Guix, like cmake vs gnu. Does one have more features than the other (I heard something about cross compilation)? And another question. How did you find the failing dependencies in the first place? Did you build all the dependencies of the netcdf packages with --sources=all? Thanks for the help. Roman