diff --git a/hnix-store-json/src/System/Nix/JSON.hs b/hnix-store-json/src/System/Nix/JSON.hs
index 6b944c33..fcbe1529 100644
--- a/hnix-store-json/src/System/Nix/JSON.hs
+++ b/hnix-store-json/src/System/Nix/JSON.hs
@@ -10,6 +10,7 @@ which is required for `-remote`.
 module System.Nix.JSON where
 
 import Data.Aeson
+import Data.Aeson.Types (toJSONKeyText)
 import Deriving.Aeson
 import System.Nix.Base (BaseEncoding(NixBase32))
 import System.Nix.OutputName (OutputName)
@@ -90,7 +91,13 @@ instance ToJSON (DerivationOutput OutputName) where
     . System.Nix.Realisation.derivationOutputBuilder
         System.Nix.OutputName.unOutputName
 
-instance ToJSONKey (DerivationOutput OutputName)
+instance ToJSONKey (DerivationOutput OutputName) where
+  toJSONKey =
+    toJSONKeyText
+    $ Data.Text.Lazy.toStrict
+    . Data.Text.Lazy.Builder.toLazyText
+    . System.Nix.Realisation.derivationOutputBuilder
+        System.Nix.OutputName.unOutputName
 
 instance FromJSON (DerivationOutput OutputName) where
   parseJSON =
@@ -102,7 +109,15 @@ instance FromJSON (DerivationOutput OutputName) where
         System.Nix.OutputName.mkOutputName
     )
 
-instance FromJSONKey (DerivationOutput OutputName)
+instance FromJSONKey (DerivationOutput OutputName) where
+  fromJSONKey =
+    FromJSONKeyTextParser
+    ( either
+        (fail . show)
+        pure
+    . System.Nix.Realisation.derivationOutputParser
+        System.Nix.OutputName.mkOutputName
+    )
 
 instance ToJSON Signature where
   toJSON = toJSON . System.Nix.Signature.signatureToText
diff --git a/hnix-store-json/tests/JSONSpec.hs b/hnix-store-json/tests/JSONSpec.hs
index b7a6f91e..d5e0eac3 100644
--- a/hnix-store-json/tests/JSONSpec.hs
+++ b/hnix-store-json/tests/JSONSpec.hs
@@ -95,10 +95,10 @@ spec = do
         encode sampleDerivationOutput `shouldBe` "\"sha256:1b4sb93wp679q4zx9k1ignby1yna3z7c4c2ri3wphylbc2dwsys0!foo\""
 
       it "sampleRealisation0 matches preimage" $
-        encode sampleRealisation0 `shouldBe` "{\"outPath\":\"cdips4lakfk1qbf1x68fq18wnn3r5r14-builder.sh\",\"signatures\":[],\"dependentRealisations\":[]}"
+        encode sampleRealisation0 `shouldBe` "{\"outPath\":\"cdips4lakfk1qbf1x68fq18wnn3r5r14-builder.sh\",\"signatures\":[],\"dependentRealisations\":{}}"
 
       it "sampleRealisation1 matches preimage" $
-        encode sampleRealisation1 `shouldBe` "{\"outPath\":\"5rwxzi7pal3qhpsyfc16gzkh939q1np6-curl-7.82.0.drv\",\"signatures\":[\"SMjnB3mPgXYjXacU+xN24BdzXlAgGAuFnYwPddU3bhjfHBeQus/OimdIPMgR/JMKFPHXORrk7pbjv68vecTEBA==\",\"fW3iEMfyx6IZzGNswD54BjclfkXiYzh0xRXddrXfJ1rp1l8p1xTi9/0g2EibbwLFb6p83cwIJv5KtTGksC54CQ==\"],\"dependentRealisations\":[[\"sha256:1b4sb93wp679q4zx9k1ignby1yna3z7c4c2ri3wphylbc2dwsys0!foo\",\"9472ijanf79nlkb5n1yh57s7867p1930-testFixed\"]]}"
+        encode sampleRealisation1 `shouldBe` "{\"outPath\":\"5rwxzi7pal3qhpsyfc16gzkh939q1np6-curl-7.82.0.drv\",\"signatures\":[\"SMjnB3mPgXYjXacU+xN24BdzXlAgGAuFnYwPddU3bhjfHBeQus/OimdIPMgR/JMKFPHXORrk7pbjv68vecTEBA==\",\"fW3iEMfyx6IZzGNswD54BjclfkXiYzh0xRXddrXfJ1rp1l8p1xTi9/0g2EibbwLFb6p83cwIJv5KtTGksC54CQ==\"],\"dependentRealisations\":{\"sha256:1b4sb93wp679q4zx9k1ignby1yna3z7c4c2ri3wphylbc2dwsys0!foo\":\"9472ijanf79nlkb5n1yh57s7867p1930-testFixed\"}}"
 
 forceRight
   :: Show a
diff --git a/hnix-store-remote/hnix-store-remote.cabal b/hnix-store-remote/hnix-store-remote.cabal
index ae3843b9..f3fd7c39 100644
--- a/hnix-store-remote/hnix-store-remote.cabal
+++ b/hnix-store-remote/hnix-store-remote.cabal
@@ -107,8 +107,10 @@ library
   build-depends:
       base >=4.12 && <5
     , hnix-store-core >= 0.8 && <0.9
+    , hnix-store-json >= 0.1
     , hnix-store-nar >= 0.1
     , hnix-store-tests >= 0.1
+    , aeson
     , attoparsec
     , bytestring
     , cereal
diff --git a/hnix-store-remote/src/System/Nix/Store/Remote/Serializer.hs b/hnix-store-remote/src/System/Nix/Store/Remote/Serializer.hs
index f021a2ef..d7f3583d 100644
--- a/hnix-store-remote/src/System/Nix/Store/Remote/Serializer.hs
+++ b/hnix-store-remote/src/System/Nix/Store/Remote/Serializer.hs
@@ -113,6 +113,7 @@ import qualified Control.Monad.Reader
 import qualified Data.Attoparsec.Text
 import qualified Data.Bits
 import qualified Data.ByteString
+import qualified Data.ByteString.Lazy
 import qualified Data.HashSet
 import qualified Data.Map.Strict
 import qualified Data.Maybe
@@ -133,6 +134,7 @@ import System.Nix.ContentAddress (ContentAddress)
 import System.Nix.Derivation (Derivation(..), DerivationOutput(..))
 import System.Nix.DerivedPath (DerivedPath, ParseOutputsError)
 import System.Nix.Hash (HashAlgo(..))
+import System.Nix.JSON ()
 import System.Nix.OutputName (OutputName)
 import System.Nix.Realisation (DerivationOutputError, Realisation(..))
 import System.Nix.Signature (Signature, NarSignature)
@@ -141,6 +143,7 @@ import System.Nix.StorePath (HasStoreDir(..), InvalidNameError, InvalidPathError
 import System.Nix.StorePath.Metadata (Metadata(..), StorePathTrust(..))
 import System.Nix.Store.Remote.Types
 
+import qualified Data.Aeson
 import qualified Data.Coerce
 import qualified Data.Bifunctor
 import qualified Data.Some
@@ -616,14 +619,11 @@ realisation
   => NixSerializer r SError Realisation
 realisation = Serializer
   { getS = do
-      realisationOutPath <- getS storePath
-      realisationSignatures <- getS (set signature)
-      realisationDependencies <- getS (mapS derivationOutputTyped storePath)
-      pure Realisation{..}
-  , putS = \Realisation{..} -> do
-      putS storePath realisationOutPath
-      putS (set signature) realisationSignatures
-      putS (mapS derivationOutputTyped storePath) realisationDependencies
+      rb <- getS byteString
+      case Data.Aeson.eitherDecode (Data.ByteString.Lazy.fromStrict rb) of
+        Left e -> error e
+        Right r -> pure r
+  , putS = putS byteString . Data.ByteString.Lazy.toStrict . Data.Aeson.encode
   }
 
 -- * Signatures
@@ -816,7 +816,11 @@ buildResult = Serializer
 
       buildResultBuiltOutputs <-
         if protoVersion_minor pv >= 28
-        then pure <$> getS (mapS outputName realisation)
+        then
+            pure
+          . Data.Map.Strict.mapKeys
+              System.Nix.Realisation.derivationOutputName
+          <$> getS (mapS derivationOutputTyped realisation)
         else pure Nothing
       pure BuildResult{..}
 
@@ -831,6 +835,7 @@ buildResult = Serializer
         putS time $ Data.Maybe.fromMaybe t0 buildResultStartTime
         putS time $ Data.Maybe.fromMaybe t0 buildResultStopTime
       Control.Monad.when (protoVersion_minor pv >= 28)
+        -- TODO realisation.id
         $ putS (mapS outputName realisation)
         $ Data.Maybe.fromMaybe mempty buildResultBuiltOutputs
   }