[bug#68425] [PATCH] gnu: python-activepapers: Fix build.

[Troy Figiel]

* gnu/packages/python-xyz.scm (python-activepapers)[source]: Add snippet fixing 
MutableMapping import.
---
 gnu/packages/python-xyz.scm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 37d7dd0dd5..ddba925fd7 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -24143,6 +24143,12 @@ (define-public python-activepapers
      (origin
        (method url-fetch)
        (uri (pypi-uri "ActivePapers.Py" version))
+       ;; This package has not seen active maintenance since 2017. This is a
+       ;; hack needed to make it build against a recent version of Python 3.
+       (modules '((guix build utils)))
+       (snippet '(substitute* "lib/activepapers/execution.py"
+                   (("collections\\.MutableMapping")
+                    "collections.abc.MutableMapping")))
        (sha256
         (base32
          "12wkhjh90ffipjzv10swndp2xv9hd7xrxvg6v0n4n3i411pj4xb8"))))

base-commit: c0b303aaa3d6154acbe054120d11467eb98e6d33
-- 
2.42.0