diff --git a/pkgs/tools/security/pass/extensions/genphrase.nix b/pkgs/tools/security/pass/extensions/genphrase.nix
index dff64d7f1855..c8a1f730e049 100644
--- a/pkgs/tools/security/pass/extensions/genphrase.nix
+++ b/pkgs/tools/security/pass/extensions/genphrase.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub }:
+{ lib, stdenv, fetchFromGitHub, python3 }:
 
 stdenv.mkDerivation rec {
   pname = "pass-genphrase";
@@ -13,6 +13,8 @@ stdenv.mkDerivation rec {
 
   dontBuild = true;
 
+  buildInputs = [ python3 ];
+
   installTargets = [ "globalinstall" ];
 
   installFlags = [ "PREFIX=$(out)" ];