diff --git a/gnu/packages/image.scm b/gnu/packages/image.scm
index d714a1949f..a86d0e749f 100644
--- a/gnu/packages/image.scm
+++ b/gnu/packages/image.scm
@@ -893,7 +893,7 @@ (define-public vigra
    (native-inputs
     `(("doxygen" ,doxygen)
       ("python2-nose" ,python2-nose)
-      ("python2-sphinx" ,python2-sphinx)))
+      ("sphinx" ,python-sphinx)))
    (arguments
     `(#:test-target "check"
       #:phases
diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index 2f56b7bcba..7346a3fe75 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -897,7 +897,7 @@ (define-public notmuch
        ("pkg-config" ,pkg-config)
        ("python" ,python-2)
        ("python-docutils" ,python2-docutils)
-       ("python-sphinx" ,python2-sphinx)
+       ("sphinx" ,python-sphinx)
 
        ;; The following are required for tests only.
        ("which" ,which)