diff --git a/ci.nix b/ci.nix
index 546f26aa..4dd1f56d 100644
--- a/ci.nix
+++ b/ci.nix
@@ -45,8 +45,8 @@ in
       xo-callback
       xo-object
       xo-ordinaltree
-
       xo-expression
+      xo-pyexpression
       xo-tokenizer
       xo-reader
       xo-jit
diff --git a/shells.nix b/shells.nix
index 9f2bf6e3..ef18d660 100644
--- a/shells.nix
+++ b/shells.nix
@@ -352,6 +352,10 @@ in
     callback       = pkgs.xo-callback;
     object         = pkgs.xo-object;
     ordinaltree    = pkgs.xo-ordinaltree;
+    expression     = pkgs.xo-expression;
+    pyexpression   = pkgs.xo-pyexpression;
+    tokenizer      = pkgs.xo-tokenizer;
+    reader         = pkgs.xo-reader;
 
     webutil        = pkgs.xo-webutil;
     pywebutil      = pkgs.xo-pywebutil;
@@ -370,10 +374,6 @@ in
     pyprocess      = pkgs.xo-pyprocess;
     kalmanfilter   = pkgs.xo-kalmanfilter;
     pykalmanfilter = pkgs.xo-pykalmanfilter;
-    expression     = pkgs.xo-expression;
-    pyexpression   = pkgs.xo-pyexpression;
-    tokenizer      = pkgs.xo-tokenizer;
-    reader         = pkgs.xo-reader;
     jit            = pkgs.xo-jit;
     pyjit          = pkgs.xo-pyjit;
   };
diff --git a/xo.nix b/xo.nix
index 5a81625f..130a5b71 100644
--- a/xo.nix
+++ b/xo.nix
@@ -58,6 +58,10 @@ let
     xo-callback       = callPackage pkgs/xo-callback.nix       { stdenv = jitStdenv; };
     xo-object         = callPackage pkgs/xo-object.nix         { stdenv = jitStdenv; };
     xo-ordinaltree    = callPackage pkgs/xo-ordinaltree.nix    { stdenv = jitStdenv; };
+    xo-expression     = callPackage pkgs/xo-expression.nix     { stdenv = jitStdenv;                   buildExamples = true; };
+    xo-pyexpression   = callPackage pkgs/xo-pyexpression.nix   { stdenv = jitStdenv; };
+    xo-tokenizer      = callPackage pkgs/xo-tokenizer.nix      { stdenv = jitStdenv; buildDocs = true; buildExamples = true; };
+    xo-reader         = callPackage pkgs/xo-reader.nix         { stdenv = jitStdenv; buildDocs = true; buildExamples = true; };
     xo-webutil        = callPackage pkgs/xo-webutil.nix        { stdenv = jitStdenv; };
     xo-pywebutil      = callPackage pkgs/xo-pywebutil.nix      {};
     xo-printjson      = callPackage pkgs/xo-printjson.nix      {};
@@ -75,10 +79,6 @@ let
     xo-pyprocess      = callPackage pkgs/xo-pyprocess.nix      {};
     xo-kalmanfilter   = callPackage pkgs/xo-kalmanfilter.nix   {};
     xo-pykalmanfilter = callPackage pkgs/xo-pykalmanfilter.nix {};
-    xo-expression     = callPackage pkgs/xo-expression.nix     {                   buildExamples = true; };
-    xo-pyexpression   = callPackage pkgs/xo-pyexpression.nix   {};
-    xo-tokenizer      = callPackage pkgs/xo-tokenizer.nix      { buildDocs = true; buildExamples = true; };
-    xo-reader         = callPackage pkgs/xo-reader.nix         { buildDocs = true; buildExamples = true; };
     xo-jit            = callPackage pkgs/xo-jit.nix            { buildDocs = true; buildExamples = true;
                                                                   llvm = llvmPackages1.llvm; };
     xo-pyjit          = callPackage pkgs/xo-pyjit.nix          {};