diff --git a/horizon.dhall b/horizon.dhall
index bbe95398de96a1026ba41b3956bad8ea538852eb..c4c0061cb85844acf4377f08e990ad07785a5016 100644
--- a/horizon.dhall
+++ b/horizon.dhall
@@ -545,8 +545,8 @@ let packages =
       , hls-splice-plugin = H.callHackage "hls-splice-plugin" "1.0.3.0"
       , hls-test-utils = H.callHackage "hls-test-utils" "1.5.0.0"
       , hopenssl = H.callHackage "hopenssl" "2.2.4"
-      , horizon-gen-nix = H.callHackage "horizon-gen-nix" "0.5"
-      , horizon-spec = H.callHackage "horizon-spec" "0.5"
+      , horizon-gen-nix = H.callHackage "horizon-gen-nix" "0.6"
+      , horizon-spec = H.callHackage "horizon-spec" "0.6"
       , hosc = H.callHackage "hosc" "0.19.1"
       , hostname = H.callHackage "hostname" "1.0"
       , hourglass = H.callHackage "hourglass" "0.2.12"
diff --git a/pkgs/horizon-gen-nix.nix b/pkgs/horizon-gen-nix.nix
index 33d488c688130a0ea5f5fc34da439f9fecd8c3c4..e47000c5e8f363327928c8d0b6ac2f9ceeb84fd7 100644
--- a/pkgs/horizon-gen-nix.nix
+++ b/pkgs/horizon-gen-nix.nix
@@ -21,8 +21,8 @@
 }:
 mkDerivation {
   pname = "horizon-gen-nix";
-  version = "0.5";
-  sha256 = "5b57b9038d9dd0e29e8c32acc979b2c753b078ab81f61dfaa3f2609a57451515";
+  version = "0.6";
+  sha256 = "814a01e62e66aca869df8738656e1c351a9b20a6cfe1f25fac2070f6073f0db6";
   isLibrary = true;
   isExecutable = true;
   enableSeparateDataOutput = false;
diff --git a/pkgs/horizon-spec.nix b/pkgs/horizon-spec.nix
index 3e4554c6862016c5ae2017ae348e2779df4a82f7..a56fdc37dab8d34c326937b0e2b6fda6667643c0 100644
--- a/pkgs/horizon-spec.nix
+++ b/pkgs/horizon-spec.nix
@@ -11,8 +11,8 @@
 }:
 mkDerivation {
   pname = "horizon-spec";
-  version = "0.5";
-  sha256 = "ad53944bff29788217e58608c312eb6186700821be8db78090e53c94f4783656";
+  version = "0.6";
+  sha256 = "dc69a2f7aba3221465c7e3e1de65ebc993724f246defe77a96f2ae71d371c25c";
   isLibrary = true;
   isExecutable = true;
   enableSeparateDataOutput = false;