diff --git a/test/default.nix b/test/default.nix
index 0b0b5faf..506dbadc 100644
--- a/test/default.nix
+++ b/test/default.nix
@@ -18,6 +18,7 @@ let
 in {
   cabal-simple = callPackage ./cabal-simple { inherit haskell; };
   cabal-22 = callPackage ./cabal-22 { inherit haskell; };
+  with-packages = callPackage ./with-packages { inherit haskell; };
 
   # Run unit tests with: nix-instantiate --eval --strict -A unit
   # An empty list means success.
diff --git a/test/with-packages/Point.hs b/test/with-packages/Point.hs
new file mode 100644
index 00000000..25b583c1
--- /dev/null
+++ b/test/with-packages/Point.hs
@@ -0,0 +1,12 @@
+{-# LANGUAGE TemplateHaskell #-}
+module Main where
+
+import Control.Lens
+
+data Point = Point { _x :: Double, _y :: Double }
+makeLenses ''Point
+
+main :: IO ()
+main = print (point^.x + point^.y)
+  where
+    point = Point { _x = 40.0, _y = 2.0 }
diff --git a/test/with-packages/Setup.hs b/test/with-packages/Setup.hs
new file mode 100644
index 00000000..9a994af6
--- /dev/null
+++ b/test/with-packages/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/test/with-packages/TestWithPackages.hs b/test/with-packages/TestWithPackages.hs
new file mode 100644
index 00000000..f8852cd8
--- /dev/null
+++ b/test/with-packages/TestWithPackages.hs
@@ -0,0 +1,6 @@
+-- | Haddock test stuff
+module TestWithPackages (hello) where
+
+-- | Standard hello text.
+hello :: String
+hello = "Hello, world!"
diff --git a/test/with-packages/default.nix b/test/with-packages/default.nix
new file mode 100644
index 00000000..b24fb1f5
--- /dev/null
+++ b/test/with-packages/default.nix
@@ -0,0 +1,68 @@
+{ pkgs
+, haskell
+, stdenv
+}:
+
+with stdenv.lib;
+
+let
+  pkgSet = haskell.mkPkgSet {
+    inherit pkgs;
+    # generated with:
+    #   cabal new-build
+    #   plan-to-nix dist-newstyle/cache/plan.json > plan.nix 
+    #   cabal-to-nix test-with-packages.cabal > test-with-packages.nix 
+    pkg-def = import ./plan.nix;
+    pkg-def-overlays = [
+      { test-with-packages = ./test-with-packages.nix; }
+    ];
+    modules = [
+      # overrides to fix the build
+      {
+        packages.transformers-compat.components.library.doExactConfig = true;
+      }
+    ];
+  };
+
+  packages = pkgSet.config.hsPkgs;
+
+  # Add cabal as a buildInput for a haskell derivation. Useful for nix-shell.
+  addCabalInstall = drv: drv.overrideAttrs (oldAttrs: {
+    buildInputs = (oldAttrs.buildInputs or []) ++ [ pkgs.cabal-install ];
+  });
+
+in
+  stdenv.mkDerivation {
+    name = "with-packages-test";
+
+    buildCommand = let
+      package = packages.test-with-packages;
+      inherit (package.components) library;
+    in ''
+      ########################################################################
+      # test with-packages
+
+      printf "checking that the 'all' component works... " >& 2
+      echo ${package.components.all}
+      # echo >& 2
+
+      printf "checking that the package env has the dependencies... " >& 2
+      ${package.components.all.env}/bin/runghc ${./Point.hs}
+      echo >& 2
+
+      printf "checking that components.library.env has the dependencies... " >& 2
+      ${library.env}/bin/runghc ${./Point.hs}
+      # echo >& 2
+
+      touch $out
+    '';
+
+    meta.platforms = platforms.all;
+} // {
+  # Used for debugging with nix repl
+  inherit packages pkgSet;
+
+  # Used for testing externally with nix-shell (../tests.sh).
+  # This just adds cabal-install to the existing shells.
+  test-shell = addCabalInstall packages.test-with-packages.components.all;
+}
diff --git a/test/with-packages/plan.nix b/test/with-packages/plan.nix
new file mode 100644
index 00000000..49823506
--- /dev/null
+++ b/test/with-packages/plan.nix
@@ -0,0 +1,99 @@
+hackage:
+  {
+    packages = {
+      "void".revision = hackage."void"."0.7.2".revisions.default;
+      "semigroupoids".revision = hackage."semigroupoids"."5.2.2".revisions.default;
+      "free".revision = hackage."free"."5.0.2".revisions.default;
+      "exceptions".revision = hackage."exceptions"."0.10.0".revisions.default;
+      "binary".revision = hackage."binary"."0.8.5.1".revisions.default;
+      "ghc-prim".revision = hackage."ghc-prim"."0.5.2.0".revisions.default;
+      "bifunctors".revision = hackage."bifunctors"."5.5.3".revisions.default;
+      "stm".revision = hackage."stm"."2.4.5.1".revisions.default;
+      "mtl".revision = hackage."mtl"."2.2.2".revisions.default;
+      "rts".revision = hackage."rts"."1.0".revisions.default;
+      "adjunctions".revision = hackage."adjunctions"."4.4".revisions.default;
+      "invariant".revision = hackage."invariant"."0.5.1".revisions.default;
+      "distributive".revision = hackage."distributive"."0.5.3".revisions.default;
+      "parallel".revision = hackage."parallel"."3.2.2.0".revisions.default;
+      "deepseq".revision = hackage."deepseq"."1.4.3.0".revisions.default;
+      "semigroups".revision = hackage."semigroups"."0.18.5".revisions.default;
+      "transformers-compat".revision = hackage."transformers-compat"."0.6.2".revisions.default;
+      "template-haskell".revision = hackage."template-haskell"."2.13.0.0".revisions.default;
+      "vector".revision = hackage."vector"."0.12.0.1".revisions.default;
+      "call-stack".revision = hackage."call-stack"."0.1.0".revisions.default;
+      "primitive".revision = hackage."primitive"."0.6.3.0".revisions.default;
+      "profunctors".revision = hackage."profunctors"."5.2.2".revisions.default;
+      "tagged".revision = hackage."tagged"."0.8.5".revisions.default;
+      "lens".revision = hackage."lens"."4.16.1".revisions.default;
+      "containers".revision = hackage."containers"."0.5.11.0".revisions.default;
+      "reflection".revision = hackage."reflection"."2.1.4".revisions.default;
+      "bytestring".revision = hackage."bytestring"."0.10.8.2".revisions.default;
+      "StateVar".revision = hackage."StateVar"."1.1.1.1".revisions.default;
+      "contravariant".revision = hackage."contravariant"."1.4.1".revisions.default;
+      "text".revision = hackage."text"."1.2.3.1".revisions.default;
+      "unordered-containers".revision = hackage."unordered-containers"."0.2.9.0".revisions.default;
+      "base".revision = hackage."base"."4.11.1.0".revisions.default;
+      "comonad".revision = hackage."comonad"."5.0.4".revisions.default;
+      "transformers".revision = hackage."transformers"."0.5.5.0".revisions.default;
+      "hashable".revision = hackage."hashable"."1.2.7.0".revisions.default;
+      "transformers-base".revision = hackage."transformers-base"."0.4.5.2".revisions.default;
+      "filepath".revision = hackage."filepath"."1.4.2".revisions.default;
+      "kan-extensions".revision = hackage."kan-extensions"."5.2".revisions.default;
+      "pretty".revision = hackage."pretty"."1.1.3.6".revisions.default;
+      "ghc-boot-th".revision = hackage."ghc-boot-th"."8.4.4".revisions.default;
+      "base-orphans".revision = hackage."base-orphans"."0.7".revisions.default;
+      "th-abstraction".revision = hackage."th-abstraction"."0.2.8.0".revisions.default;
+      "array".revision = hackage."array"."0.5.2.0".revisions.default;
+      "integer-gmp".revision = hackage."integer-gmp"."1.0.2.0".revisions.default;
+    };
+    compiler = {
+      version = "8.4.4";
+      nix-name = "ghc844";
+      packages = {
+        "void" = "0.7.2";
+        "semigroupoids" = "5.2.2";
+        "free" = "5.0.2";
+        "exceptions" = "0.10.0";
+        "binary" = "0.8.5.1";
+        "ghc-prim" = "0.5.2.0";
+        "bifunctors" = "5.5.3";
+        "stm" = "2.4.5.1";
+        "mtl" = "2.2.2";
+        "rts" = "1.0";
+        "adjunctions" = "4.4";
+        "invariant" = "0.5.1";
+        "distributive" = "0.5.3";
+        "parallel" = "3.2.2.0";
+        "deepseq" = "1.4.3.0";
+        "semigroups" = "0.18.5";
+        "transformers-compat" = "0.6.2";
+        "template-haskell" = "2.13.0.0";
+        "vector" = "0.12.0.1";
+        "call-stack" = "0.1.0";
+        "primitive" = "0.6.3.0";
+        "profunctors" = "5.2.2";
+        "tagged" = "0.8.5";
+        "lens" = "4.16.1";
+        "containers" = "0.5.11.0";
+        "reflection" = "2.1.4";
+        "bytestring" = "0.10.8.2";
+        "StateVar" = "1.1.1.1";
+        "contravariant" = "1.4.1";
+        "text" = "1.2.3.1";
+        "unordered-containers" = "0.2.9.0";
+        "base" = "4.11.1.0";
+        "comonad" = "5.0.4";
+        "transformers" = "0.5.5.0";
+        "hashable" = "1.2.7.0";
+        "transformers-base" = "0.4.5.2";
+        "filepath" = "1.4.2";
+        "kan-extensions" = "5.2";
+        "pretty" = "1.1.3.6";
+        "ghc-boot-th" = "8.4.4";
+        "base-orphans" = "0.7";
+        "th-abstraction" = "0.2.8.0";
+        "array" = "0.5.2.0";
+        "integer-gmp" = "1.0.2.0";
+      };
+    };
+  }
diff --git a/test/with-packages/test-with-packages.cabal b/test/with-packages/test-with-packages.cabal
new file mode 100644
index 00000000..b2b41635
--- /dev/null
+++ b/test/with-packages/test-with-packages.cabal
@@ -0,0 +1,15 @@
+cabal-version:       2.2
+name:                test-with-packages
+version:             0.1.0.0
+license:             NONE
+author:              Rodney Lorrimar
+maintainer:          rodney.lorrimar@iohk.io
+
+library
+  exposed-modules:     TestWithPackages
+  -- other-modules:
+  -- other-extensions:
+  build-depends:       base ^>=4.11.1.0
+                     , lens
+  -- hs-source-dirs:
+  default-language:    Haskell2010
diff --git a/test/with-packages/test-with-packages.nix b/test/with-packages/test-with-packages.nix
new file mode 100644
index 00000000..9b2a9695
--- /dev/null
+++ b/test/with-packages/test-with-packages.nix
@@ -0,0 +1,36 @@
+{ system
+, compiler
+, flags
+, pkgs
+, hsPkgs
+, pkgconfPkgs
+, ... }:
+  {
+    flags = {};
+    package = {
+      specVersion = "2.2";
+      identifier = {
+        name = "test-with-packages";
+        version = "0.1.0.0";
+      };
+      license = "NONE";
+      copyright = "";
+      maintainer = "rodney.lorrimar@iohk.io";
+      author = "Rodney Lorrimar";
+      homepage = "";
+      url = "";
+      synopsis = "";
+      description = "";
+      buildType = "Simple";
+    };
+    components = {
+      "library" = {
+        depends = [
+          (hsPkgs.base)
+          (hsPkgs.lens)
+        ];
+      };
+    };
+  } // rec {
+    src = pkgs.lib.mkDefault ./.;
+  }