diff --git a/pkgs/servers/seafile-server/default.nix b/pkgs/servers/seafile-server/default.nix
index d60dd7809913..464c808bac06 100644
--- a/pkgs/servers/seafile-server/default.nix
+++ b/pkgs/servers/seafile-server/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, pkg-config, python3Packages, autoreconfHook
+{ stdenv, lib, fetchFromGitHub, pkg-config, python3, autoreconfHook
 , libuuid, sqlite, glib, libevent, libsearpc, openssl, fuse, libarchive, which
 , vala, cmake, oniguruma }:
 
@@ -28,7 +28,7 @@ in stdenv.mkDerivation rec {
     glib
     libsearpc
     libevent
-    python3Packages.python
+    python3
     fuse
     libarchive
     which
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 08a299137eb4..33b35de72ba3 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -8738,7 +8738,9 @@ in {
 
   seahub = callPackage ../development/python-modules/seahub { };
 
-  seaserv = toPythonModule pkgs.seafile-server;
+  seaserv = toPythonModule (pkgs.seafile-server.override {
+    python3 = self.python;
+  });
 
   seatconnect = callPackage ../development/python-modules/seatconnect { };