diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 766cf8aa3a..f3bebc9881 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -2297,6 +2297,26 @@ (define-public python-filelock
 inter-process communication.")
     (license license:unlicense)))
 
+(define-public python-filelock-3.5
+  (package
+    (name "python-filelock")
+    (version "3.5.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "filelock" version))
+       (sha256
+        (base32
+         "058av1r760ws7z6qffsjpqa39fmdxw0s1wnyr7p50y3zclg6cyqk"))))
+    (build-system pyproject-build-system)
+    (native-inputs (list python-pytest python-setuptools-scm))
+    (home-page "https://github.com/tox-dev/py-filelock")
+    (synopsis "Platform independent file lock")
+    (description "@code{filelock} contains a single module implementing
+a platform independent file lock in Python, which provides a simple way of
+inter-process communication.")
+    (license license:unlicense)))
+
 (define-public python-semantic-version
   (package
     (name "python-semantic-version")