Hello, $ guix environment --ad-hoc inkscape [env]$ inkscape /tmp/guixtile.svg /gnu/store/7bs616gpgnmj4g5d0g88dkphd1gqbicy-inkscape-1.0.2/bin/.inkscape-real: error while loading shared libraries: libMagickCore-6.Q16.so.6: cannot open shared object file: No such file or directory The same happens when I add imagemagick of imagemagick@6.9.11-48 or imagemagick@6.9.12-2g to the environment. But maybe the older imagemagick is not even built? $ guix build imagemagick@6.9.11-48 /gnu/store/m794l5c82clc3xa1lkg30pr96y9a60m3-imagemagick-6.9.12-2g-doc /gnu/store/nnw0jnxpcf5bfaxbc3c5dkw87j13bq94-imagemagick-6.9.12-2g Notice the version mismatch! $ guix build imagemagick@6.9.11 guix build: error: imagemagick: package not found for version 6.9.11 It should work to just specify a version prefix, right? $ guix describe Generation 29 Mar 11 2021 12:17:47 (current) guix 500189b repository URL: https://git.savannah.gnu.org/git/guix.git commit: 500189b4d2f1e3a2d4ee8ab73d889e3d8ac70632 This is probably due to commit 82e887ba48c2ba91b17aa9b6b17501e3e0ef4aef Author: Lï¿œo Le Bouter Date: Tue Mar 9 23:02:51 2021 +0100 gnu: imagemagick: Update to 6.9.12-2 [security fixes]. * gnu/packages/imagemagick.scm (imagemagick/fixed): New variable. (imagemagick)[replacement]: Graft. I am not familiar with replacements, but it appears they force an update. This should not happen together with a library soname change; effectively, the result is a removal of the previous imagemagick package from Guix together with the addition of an unrelated new one, that cannot replace the previous one, but just happens to be a different program sharing the same name. So in this case, the only option is to upgrade the imagemagick package and to recompile all its dependents. Andreas