diff --git a/default.nix b/default.nix
index e4fb6a9..339f658 100644
--- a/default.nix
+++ b/default.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ./nix/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {
diff --git a/lib/expressions/CompositionExpression.js b/lib/expressions/CompositionExpression.js
index 474ff0d..526f6c8 100644
--- a/lib/expressions/CompositionExpression.js
+++ b/lib/expressions/CompositionExpression.js
@@ -119,9 +119,13 @@ CompositionExpression.prototype.toNixAST = function() {
                             }),
                             thenExpr: new nijs.NixAttrReference({
                                 attrSetExpr: new nijs.NixExpression("pkgs"),
-                                refExpr: new nijs.NixAttrReference({
-                                    attrSetExpr: new nijs.NixExpression("darwin"),
-                                    refExpr: new nijs.NixExpression("cctools")
+                                refExpr: new nijs.NixExpression("cctools"),
+                                orExpr: new nijs.NixAttrReference({
+                                    attrSetExpr: new nijs.NixExpression("pkgs"),
+                                    refExpr: new nijs.NixAttrReference({
+                                        attrSetExpr: new nijs.NixExpression("darwin"),
+                                        refExpr: new nijs.NixExpression("cctools")
+                                    }),
                                 }),
                             }),
                             elseExpr: null
diff --git a/tests/default-v14.nix b/tests/default-v14.nix
index e528025..b57d26b 100644
--- a/tests/default-v14.nix
+++ b/tests/default-v14.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../nix/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages-v14.nix {
diff --git a/tests/default-v16.nix b/tests/default-v16.nix
index 8c1f04a..c266bb9 100644
--- a/tests/default-v16.nix
+++ b/tests/default-v16.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../nix/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages-v16.nix {
diff --git a/tests/grunt/default.nix b/tests/grunt/default.nix
index e82a458..4c821b6 100644
--- a/tests/grunt/default.nix
+++ b/tests/grunt/default.nix
@@ -12,7 +12,7 @@ let
   nodeEnv = import ../../nix/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {
diff --git a/tests/lockfile-v2/default.nix b/tests/lockfile-v2/default.nix
index 23b68b9..dad5a7c 100644
--- a/tests/lockfile-v2/default.nix
+++ b/tests/lockfile-v2/default.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../../nix/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {
diff --git a/tests/lockfile/default.nix b/tests/lockfile/default.nix
index 23b68b9..dad5a7c 100644
--- a/tests/lockfile/default.nix
+++ b/tests/lockfile/default.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../../nix/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {
diff --git a/tests/scoped/default.nix b/tests/scoped/default.nix
index 23b68b9..dad5a7c 100644
--- a/tests/scoped/default.nix
+++ b/tests/scoped/default.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../../nix/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {
diff --git a/tests/versionless/default.nix b/tests/versionless/default.nix
index 23b68b9..dad5a7c 100644
--- a/tests/versionless/default.nix
+++ b/tests/versionless/default.nix
@@ -8,7 +8,7 @@ let
   nodeEnv = import ../../nix/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.isDarwin then pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {