diff --git a/pkgs/games/pokerth/default.nix b/pkgs/games/pokerth/default.nix
index f8ef4e598d0f..1f3e43e02d1f 100644
--- a/pkgs/games/pokerth/default.nix
+++ b/pkgs/games/pokerth/default.nix
@@ -7,7 +7,7 @@
   qtbase,
   SDL,
   SDL_mixer,
-  boost,
+  boost181,
   curl,
   gsasl,
   libgcrypt,
@@ -19,6 +19,10 @@
   target ? "client",
 }:
 
+let
+  boost = boost181;
+in
+
 mkDerivation rec {
   pname = "pokerth-${target}";
   version = "1.1.2";