beeper-bridge-manager: add python3 runtime dependency (#439014)

pkgs/by-name/be/beeper-bridge-manager/package.nix

@@ -2,6 +2,8 @@
   lib,
   buildGoModule,
   fetchFromGitHub,
+  makeWrapper,
+  python3,
 }:
 
 buildGoModule rec {
@@ -15,8 +17,17 @@ buildGoModule rec {
     hash = "sha256-bNnansZNshWp70LQQsa6+bS+LJxpCzdTkL2pX+ksrP0=";
   };
 
+  nativeBuildInputs = [
+    makeWrapper
+  ];
+
   vendorHash = "sha256-yTNUxwnulQ+WbHdQbeNDghH4RPXurQMIgKDyXfrMxG8=";
 
+  postInstall = ''
+    wrapProgram $out/bin/bbctl \
+      --prefix PATH : ${python3}/bin
+  '';
+
   meta = {
     description = "Tool for running self-hosted bridges with the Beeper Matrix server";
     homepage = "https://github.com/beeper/bridge-manager";