diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 6265770ff0..5ba9b6d62b 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -22006,8 +22006,7 @@ (define-public python-numba
          (add-after 'unpack 'disable-proprietary-features
            (lambda _
              (setenv "NUMBA_DISABLE_HSA" "1")
-             (setenv "NUMBA_DISABLE_CUDA" "1")
-             #t))
+             (setenv "NUMBA_DISABLE_CUDA" "1")))
          (replace 'check
            (lambda* (#:key inputs outputs #:allow-other-keys)
              (add-installed-pythonpath inputs outputs)