diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 340a475cdb97..4e38f33cc5a5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9499,7 +9499,7 @@ in
 
   unrtf = callPackage ../tools/text/unrtf { };
 
-  unrpa = with python3Packages; toPythonApplication unrpa;
+  unrpa = with python38Packages; toPythonApplication unrpa;
 
   untex = callPackage ../tools/text/untex { };