tmuxp: fix python-kaptan

tmuxp.scm

@@ -29,6 +29,18 @@
     (description "scripting library / orm for tmux")
     (license license:expat)))
 
+(define-public python-pyyaml-5.4.1
+  (package
+    (inherit python-pyyaml)
+    (version "5.4.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "PyYAML" version))
+       (sha256
+        (base32
+         "0pm440pmpvgv5rbbnm8hk4qga5a292kvlm1bh3x2nwr8pb5p8xv0"))))))
+
 (define-public python-kaptan
   (package
     (name "python-kaptan")
@@ -42,7 +54,7 @@
          "1lix7hafsqdpdmiyihykymb1x9bp2s02ik0smzjzq8hlfdb1zg8s"))))
     (build-system python-build-system)
     (propagated-inputs
-    `(("python-pyyaml" ,python-pyyaml)))
+     `(("python-pyyaml" ,python-pyyaml-5.4.1)))
     (arguments
      '(#:tests? #f))
     (home-page "https://github.com/emre/kaptan")