diff --git a/glicid/packages/chemistry.scm b/glicid/packages/chemistry.scm
index 66c1673..3f7c6bf 100644
--- a/glicid/packages/chemistry.scm
+++ b/glicid/packages/chemistry.scm
@@ -1,9 +1,8 @@
+#!
+
 (define-module (glicid packages chemistry)
   #:use-module (guix packages)
   #:use-module (guix download)
-
-#:use-module (guix packages)
-#:use-module (guix download)
 #:use-module (guix gexp)
 #:use-module (guix utils)
 #:use-module (guix build-system cmake)
@@ -23,7 +22,8 @@
 #:use-module (gnu packages sphinx)
 #:use-module (gnu packages check)
 #:use-module (gnu packages gcc)
-#:use-module (non-free cuda))
+#:use-module (non-free cuda)
+)
 
 (define-public gromacs+cuda
   (package
@@ -78,3 +78,4 @@
               (append cuda hwloc))))
 )
 
+!#
\ No newline at end of file