diff --git a/changelog.md b/changelog.md
index d9c33ee..eba1d8c 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,6 +1,8 @@
 # Unreleased
 
 * Add a reusable workflow for managed bounds updates.
+* Parse Nix json output messages to diagnose problems; add overrides for installed packages that fail with a bounds
+  error printed by Cabal.
 
 # 0.7.0: Hix Unbound: Majors Apart
 
diff --git a/packages/hix/hix.cabal b/packages/hix/hix.cabal
index 5e59c43..924e3e3 100644
--- a/packages/hix/hix.cabal
+++ b/packages/hix/hix.cabal
@@ -334,6 +334,7 @@ test-suite hix-test
       Hix.Test.Managed.BuildOutputTest
       Hix.Test.Managed.Bump.CandidatesTest
       Hix.Test.Managed.Bump.MutationTest
+      Hix.Test.Managed.BumpNativeTest
       Hix.Test.Managed.DiffTest
       Hix.Test.Managed.LowerAuto.MutationOptimizeTest
       Hix.Test.Managed.LowerAuto.MutationStabilizeTest
diff --git a/packages/hix/test/Hix/Test/Managed/BumpNativeTest.hs b/packages/hix/test/Hix/Test/Managed/BumpNativeTest.hs
new file mode 100644
index 0000000..3398fe8
--- /dev/null
+++ b/packages/hix/test/Hix/Test/Managed/BumpNativeTest.hs
@@ -0,0 +1,135 @@
+module Hix.Test.Managed.BumpNativeTest where
+
+import Control.Monad.Trans.Reader (ask)
+import qualified Data.Text.IO as Text
+import Exon (exon)
+import Hedgehog (evalEither)
+import Path (Abs, Dir, File, Path, Rel, parent, reldir, relfile, toFilePath, (</>))
+import Path.IO (createDirIfMissing, getCurrentDir)
+
+import qualified Hix.Data.Monad
+import Hix.Data.Monad (AppResources (AppResources), M (M))
+import Hix.Data.Options (ProjectOptions (query), projectOptions)
+import Hix.Error (pathText)
+import Hix.Managed.Bump.Optimize (bumpOptimizeMain)
+import Hix.Managed.Cabal.Data.Config (GhcDb (GhcDbSystem))
+import qualified Hix.Managed.Data.EnvConfig
+import Hix.Managed.Data.EnvConfig (EnvConfig (EnvConfig))
+import Hix.Managed.Data.ManagedPackageProto (ManagedPackageProto, managedPackages)
+import Hix.Managed.Data.Packages (Packages)
+import qualified Hix.Managed.Data.ProjectContext
+import qualified Hix.Managed.Data.ProjectContextProto
+import Hix.Managed.Data.ProjectContextProto (ProjectContextProto (ProjectContextProto))
+import qualified Hix.Managed.Data.ProjectResult
+import Hix.Managed.Data.ProjectStateProto (ProjectStateProto (ProjectStateProto))
+import qualified Hix.Managed.Data.StateFileConfig
+import Hix.Managed.Data.StateFileConfig (StateFileConfig (StateFileConfig))
+import qualified Hix.Managed.Handlers.Build.Prod as Build
+import Hix.Managed.ProjectContext (updateProject)
+import qualified Hix.Managed.ProjectContextProto as ProjectContextProto
+import Hix.Test.Hedgehog (eqLines)
+import Hix.Test.Utils (UnitTest, runMTest)
+
+packages :: Packages ManagedPackageProto
+packages =
+  managedPackages [
+    (("root", "1.0"), ["tasty <1.5", "criterion <1.7"])
+  ]
+
+flake :: Path Abs Dir -> Text
+flake hixRoot =
+  [exon|{
+  description = "hix test project";
+  inputs.hix.url = "path:#{pathText hixRoot}";
+  outputs = {self, hix, ...}: hix.lib.flake ({config, lib, ...}: {
+    managed = {
+      enable = true;
+      latest.compiler = "ghc98";
+    };
+    compat.enable = false;
+    ghcVersions = [];
+    packages = {
+      root = {
+        src = ./.;
+        library = {
+          enable = true;
+          dependencies = ["tasty" "criterion"];
+        };
+      };
+    };
+    envs.latest.localPackage = api: api.minimal;
+  });
+}|]
+
+libMod :: Text
+libMod =
+  [exon|module Root where
+-- import Test.Tasty (blarkh)
+string :: String
+string = "hello"
+|]
+
+addFile :: Path Abs Dir -> Path Rel File -> Text -> M ()
+addFile root path content = do
+  createDirIfMissing True (parent file)
+  liftIO (Text.writeFile (toFilePath file) content)
+  where
+    file = root </> path
+
+setupProject :: M (Path Abs Dir)
+setupProject = do
+  AppResources {tmp} <- M ask
+  cwd <- getCurrentDir
+  let projectRoot = tmp </> [reldir|project|]
+  let hixRoot = parent (parent cwd)
+  createDirIfMissing True projectRoot
+  addFile projectRoot [relfile|flake.nix|] (flake hixRoot)
+  addFile projectRoot [relfile|lib/Root.hs|] libMod
+  pure projectRoot
+
+targetStateFile :: Text
+targetStateFile =
+  [exon|{
+  resolving = false;
+}
+|]
+
+bumpNativeTest :: M Text
+bumpNativeTest = do
+  root <- setupProject
+  let
+    stateFileConf = StateFileConfig {
+      file = [relfile|ops/managed.nix|],
+      projectRoot = Just root
+    }
+    envsConfig = [("latest", EnvConfig {targets = ["root"], ghc = GhcDbSystem Nothing})]
+    buildConfig = def
+  handlers <- Build.handlersProd stateFileConf envsConfig Nothing buildConfig def False
+  let
+    opts = (projectOptions ["latest"]) {query = ["tasty"]}
+
+    proto0 =
+      ProjectContextProto {
+        packages,
+        state = ProjectStateProto [] [] mempty mempty False,
+        envs = envsConfig,
+        buildOutputsPrefix = Nothing
+      }
+
+    stateFile = root </> [relfile|ops/managed.nix|]
+
+    run context process = do
+      result <- process handlers context
+      updateProject handlers context.build result
+      stateFileContent <- liftIO (Text.readFile (toFilePath stateFile))
+      pure (result.state, stateFileContent)
+
+  context0 <- ProjectContextProto.validate opts proto0
+  (_, stateFileContent) <- run context0 bumpOptimizeMain
+  pure stateFileContent
+
+test_bumpNative :: UnitTest
+test_bumpNative = do
+  stateFileContent <- evalEither =<< liftIO do
+    runMTest True bumpNativeTest
+  eqLines targetStateFile stateFileContent