diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index 4fac7230a6..2b48cf8c6d 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -2664,8 +2664,8 @@ with the provided training tools.")
                                        ""
                                        ,(format #f "~a/lib/guile/3.0/extensions/" out))))))
                (setenv "NLOPT_UNINSTALLED" "1")))))))
-    (inputs (list guile-3.0 octave python))
-    (native-inputs (list pkg-config swig-4.0))
+    (inputs (list guile-3.0 octave))
+    (native-inputs (list pkg-config python python-numpy swig-4.0))
     (home-page "http://ab-initio.mit.edu/wiki/")
     (synopsis "Library for nonlinear optimization")
     (description "NLopt is a library for nonlinear optimization, providing a