diff --git a/gnu/packages/cran.scm b/gnu/packages/cran.scm
index 294b5d417b..ac5635b98a 100644
--- a/gnu/packages/cran.scm
+++ b/gnu/packages/cran.scm
@@ -35858,7 +35858,7 @@ Complete access to optimized C functions is made available with
            r-rcppparallel
            r-rpf
            r-stanheaders))
-    (native-inputs (list gfortran r-knitr r-testthat))
+    (native-inputs (list gfortran r-knitr r-numderiv r-testthat))
     (home-page "http://openmx.ssri.psu.edu")
     (synopsis "Extended structural equation modelling")
     (description