diff --git a/glicid/packages/science.scm b/glicid/packages/science.scm
index 1b0a085..c50b751 100644
--- a/glicid/packages/science.scm
+++ b/glicid/packages/science.scm
@@ -19,6 +19,7 @@
   #:use-module (gnu packages maths)
   #:use-module (gnu packages mpi)
   #:use-module (gnu packages python)
+  #:use-module (past packages python)
   #:use-module (gnu packages python-xyz)
   #:use-module (gnu packages sphinx)
   #:use-module (gnu packages commencement)