diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index 39d0751..4dfe557 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -3190,6 +3190,7 @@ transcendental functions).")
      `(("python-pyparsing" ,python-pyparsing)
        ("python-pygobject" ,python-pygobject)
        ("gobject-introspection" ,gobject-introspection)
+       ("python-tkinter" ,python "tk")
        ;; The 'gtk+' package (and 'gdk-pixbuf', 'atk' and 'pango' propagated
        ;; from 'gtk+') provides the required 'typelib' files used by
        ;; 'gobject-introspection'. The location of these files is set with the
@@ -3224,7 +3225,8 @@ transcendental functions).")
        ;; FIXME: Add backends when available.
        ;("python-wxpython" ,python-wxpython)
        ;("python-pyqt" ,python-pyqt)
-       ))
+       ("tcl" ,tcl)
+       ("tk" ,tk)))
     (native-inputs
      `(("pkg-config" ,pkg-config)
        ("texlive" ,texlive)
@@ -3243,8 +3245,13 @@ transcendental functions).")
             (setenv "HOME" (getcwd))
             (call-with-output-file "setup.cfg"
               (lambda (port)
-                (format port "[rc_options]~%
-backend = GTK3Agg~%")))))
+                (format port "[directories]~%
+basedirlist = ~a,~a~%
+~%
+[rc_options]~%
+backend = TkAgg~%"
+                        (assoc-ref inputs "tcl")
+                        (assoc-ref inputs "tk"))))))
         (alist-cons-after
          'install 'install-doc
          (lambda* (#:key outputs #:allow-other-keys)