diff --git a/ci.nix b/ci.nix
index 89b29edd..5fd5ba00 100644
--- a/ci.nix
+++ b/ci.nix
@@ -51,6 +51,10 @@ in
       xo-reader
       xo-jit
       xo-pyjit
+      xo-webutil
+      xo-pywebutil
+      xo-printjson
+      xo-pyprintjson
       xo-userenv
       ;
   }
diff --git a/xo.nix b/xo.nix
index 1b930cc0..843e34e4 100644
--- a/xo.nix
+++ b/xo.nix
@@ -65,9 +65,9 @@ let
     xo-jit            = callPackage pkgs/xo-jit.nix            { stdenv = jitStdenv; buildDocs = true; buildExamples = true; llvm = llvmPackages1.llvm; };
     xo-pyjit          = callPackage pkgs/xo-pyjit.nix          { stdenv = jitStdenv; };
     xo-webutil        = callPackage pkgs/xo-webutil.nix        { stdenv = jitStdenv; };
-    xo-pywebutil      = callPackage pkgs/xo-pywebutil.nix      {};
-    xo-printjson      = callPackage pkgs/xo-printjson.nix      {};
-    xo-pyprintjson    = callPackage pkgs/xo-pyprintjson.nix    {};
+    xo-pywebutil      = callPackage pkgs/xo-pywebutil.nix      { stdenv = jitStdenv; };
+    xo-printjson      = callPackage pkgs/xo-printjson.nix      { stdenv = jitStdenv; };
+    xo-pyprintjson    = callPackage pkgs/xo-pyprintjson.nix    { stdenv = jitStdenv; };
     xo-reactor        = callPackage pkgs/xo-reactor.nix        {};
     xo-pyreactor      = callPackage pkgs/xo-pyreactor.nix      {};
     xo-websock        = callPackage pkgs/xo-websock.nix        {};