diff --git a/.nuke/build.schema.json b/.nuke/build.schema.json
index 9a68b28..1fe0a43 100644
--- a/.nuke/build.schema.json
+++ b/.nuke/build.schema.json
@@ -1,31 +1,5 @@
 {
   "$schema": "http://json-schema.org/draft-04/schema#",
-  "properties": {
-    "Configuration": {
-      "type": "string",
-      "description": "Configuration to build - Default is 'Release'",
-      "enum": [
-        "Debug",
-        "Release"
-      ]
-    },
-    "GlobalVips": {
-      "type": "boolean",
-      "description": "Test with a globally installed libvips"
-    },
-    "Package": {
-      "type": "boolean",
-      "description": "Build and create NuGet packages"
-    },
-    "SkipTests": {
-      "type": "boolean",
-      "description": "Skip unit tests"
-    },
-    "Solution": {
-      "type": "string",
-      "description": "Path to a solution file that is automatically loaded"
-    }
-  },
   "definitions": {
     "Host": {
       "type": "string",
@@ -127,5 +101,37 @@
       }
     }
   },
-  "$ref": "#/definitions/NukeBuild"
+  "allOf": [
+    {
+      "properties": {
+        "Configuration": {
+          "type": "string",
+          "description": "Configuration to build - Default is 'Release'",
+          "enum": [
+            "Debug",
+            "Release"
+          ]
+        },
+        "GlobalVips": {
+          "type": "boolean",
+          "description": "Test with a globally installed libvips"
+        },
+        "Package": {
+          "type": "boolean",
+          "description": "Build and create NuGet packages"
+        },
+        "SkipTests": {
+          "type": "boolean",
+          "description": "Skip unit tests"
+        },
+        "Solution": {
+          "type": "string",
+          "description": "Path to a solution file that is automatically loaded"
+        }
+      }
+    },
+    {
+      "$ref": "#/definitions/NukeBuild"
+    }
+  ]
 }
diff --git a/build/NetVips.Build.csproj b/build/NetVips.Build.csproj
index db8fa1f..f52af6c 100644
--- a/build/NetVips.Build.csproj
+++ b/build/NetVips.Build.csproj
@@ -13,11 +13,11 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="NuGet.CommandLine" Version="6.11.1">
+    <PackageReference Include="NuGet.CommandLine" Version="6.12.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Nuke.Common" Version="8.1.2" />
+    <PackageReference Include="Nuke.Common" Version="8.1.4" />
     <PackageReference Include="SharpZipLib" Version="1.4.2" />
   </ItemGroup>