gnu: Add python-distlib/next.

* gnu/packages/python-xyz.scm (python-distlib/next): New variable.

Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>

gnu/packages/python-xyz.scm

@@ -5641,6 +5641,19 @@ relate to packaging and distribution of Python software.  It is intended to be
 used as the basis for third-party packaging tools.")
     (license license:psfl)))
 
+;; TODO: Merge with 'python-distlib' on the next rebuild cycle.
+(define-public python-distlib/next
+  (package
+    (inherit python-distlib)
+    (version "0.3.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "distlib" version ".zip"))
+       (sha256
+        (base32
+         "1wdzv7fsjhrkhh1wfkarlhcwa8m00mgcpdsvknmf2qy8f9l13xpd"))))))
+
 (define-public python-distutils-extra
   (package
     (name "python-distutils-extra")