From 80506bc6daa1d106e6f836f741eedfa92ad4e4b6 Mon Sep 17 00:00:00 2001
From: Julien Lepiller <julien@lepiller.eu>
Date: Sat, 10 Jul 2021 01:36:50 +0200
Subject: [PATCH] gnu: python-pyyaml: Fix build.

python-cython is required to generate the C source for the libyaml
extension, which is required for the `_yaml' module to work.  This in
turn lets the `sanity-check' phase succeed.

* gnu/packages/python-xyz.scm (python-pyyaml)[inputs]: Add
python-cython.
---
 gnu/packages/python-xyz.scm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 69414dbcee..7504e9f205 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -3524,7 +3524,8 @@ environments and back.")
          "0pm440pmpvgv5rbbnm8hk4qga5a292kvlm1bh3x2nwr8pb5p8xv0"))))
     (build-system python-build-system)
     (inputs
-     `(("libyaml" ,libyaml)))
+     `(("libyaml" ,libyaml)
+       ("python-cython" ,python-cython)))
     (home-page "https://pyyaml.org")
     (synopsis "YAML parser and emitter for Python")
     (description