diff --git a/gnu/packages/gl.scm b/gnu/packages/gl.scm
index b9bce9ac7b..b149ffc508 100644
--- a/gnu/packages/gl.scm
+++ b/gnu/packages/gl.scm
@@ -359,6 +359,7 @@ also known as DXTn or DXTC) for Mesa.")
             libclc
             pkg-config
             python-mako
+            python-packaging
             python-ply
             python-pyyaml
             python-wrapper