diff --git a/gnu/packages/chemistry.scm b/gnu/packages/chemistry.scm
index 3c86a3a3e3..e177b27e9d 100644
--- a/gnu/packages/chemistry.scm
+++ b/gnu/packages/chemistry.scm
@@ -575,7 +575,6 @@ (define-public python-pymol
            glew
            libxml2
            mmtf-cpp
-           msgpack
            python-pyqt
            glm
            netcdf))