diff --git a/gnu/packages/python-science.scm b/gnu/packages/python-science.scm
index 7dd426608d..99f00afb2b 100644
--- a/gnu/packages/python-science.scm
+++ b/gnu/packages/python-science.scm
@@ -2896,7 +2896,7 @@ (define-public python-clarabel
                   (guix build utils))
       #:phases
       #~(modify-phases %standard-phases
-          (add-after 'prepare-python-module 'build-python-module
+          (add-after 'build 'build-python-module
             (assoc-ref py:%standard-phases 'build))
           (add-after 'build-python-module 'install-python-module
             (assoc-ref py:%standard-phases 'install)))