diff --git a/.gitignore b/.gitignore
index d12872b..ab414dc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,11 @@
 /.build/
 /Packages/
+.DS_Store
+/querykit.xcodeproj/project.pbxproj
+/querykit.xcodeproj/project.xcworkspace/contents.xcworkspacedata
+/querykit.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
+/querykit.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
+/querykit.xcodeproj/project.xcworkspace/xcuserdata/enzo.xcuserdatad/UserInterfaceState.xcuserstate
+/querykit.xcodeproj/xcshareddata/xcschemes/querykit-Package.xcscheme
+/querykit.xcodeproj/xcshareddata/xcschemes/querykitPackageDescription.xcscheme
+/querykit.xcodeproj/xcuserdata/enzo.xcuserdatad/xcschemes/xcschememanagement.plist
diff --git a/Package.resolved b/Package.resolved
new file mode 100644
index 0000000..6674646
--- /dev/null
+++ b/Package.resolved
@@ -0,0 +1,43 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "Commander",
+        "repositoryURL": "https://github.com/kylef/Commander.git",
+        "state": {
+          "branch": null,
+          "revision": "e5b50ad7b2e91eeb828393e89b03577b16be7db9",
+          "version": "0.8.0"
+        }
+      },
+      {
+        "package": "PathKit",
+        "repositoryURL": "https://github.com/kylef/PathKit.git",
+        "state": {
+          "branch": null,
+          "revision": "e2f5be30e4c8f531c9c1e8765aa7b71c0a45d7a0",
+          "version": "0.9.2"
+        }
+      },
+      {
+        "package": "Spectre",
+        "repositoryURL": "https://github.com/kylef/Spectre.git",
+        "state": {
+          "branch": null,
+          "revision": "f14ff47f45642aa5703900980b014c2e9394b6e5",
+          "version": "0.9.0"
+        }
+      },
+      {
+        "package": "Stencil",
+        "repositoryURL": "https://github.com/kylef/Stencil.git",
+        "state": {
+          "branch": null,
+          "revision": "0e9a78d6584e3812cd9c09494d5c7b483e8f533c",
+          "version": "0.13.1"
+        }
+      }
+    ]
+  },
+  "version": 1
+}
diff --git a/Package.swift b/Package.swift
index f1a8e20..f54329f 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,10 +1,17 @@
+// swift-tools-version:5.0
 import PackageDescription
 
-
 let package = Package(
-  name: "querykit",
-  dependencies: [
-    .Package(url: "https://github.com/kylef/Stencil.git", majorVersion: 0, minor: 9),
-    .Package(url: "https://github.com/kylef/Commander.git", majorVersion: 0, minor: 6),
-  ]
+    name: "querykit",
+    dependencies: [
+        .package(url: "https://github.com/kylef/Stencil.git",from: "0.13.0"),
+        .package(url: "https://github.com/kylef/Commander.git",  from: "0.8.0")
+    ],
+    targets: [
+        .target(
+            name: "QueryKit",
+            dependencies: ["Stencil", "Commander"],
+            path: "Sources"
+        )
+    ]
 )
diff --git a/Sources/QueryKit.swift b/Sources/QueryKit.swift
index 8ebf5c9..ac6f928 100644
--- a/Sources/QueryKit.swift
+++ b/Sources/QueryKit.swift
@@ -38,7 +38,7 @@ func compileCoreDataModel(_ source: Path) -> Path {
   return destination
 }
 
-class AttributeDescription : NSObject {
+struct AttributeDescription {
   let name: String
   let type: String
 
@@ -121,7 +121,7 @@ class CommandError : Error {
 }
 
 func render(entity: NSEntityDescription, destination: Path, template: Template) throws {
-  let attributes = entity.properties.flatMap { property -> AttributeDescription? in
+  let attributes = entity.properties.compactMap { property -> AttributeDescription? in
     if entity.qk_hasSuperProperty(property.name) {
       return nil
     }
@@ -137,6 +137,7 @@ func render(entity: NSEntityDescription, destination: Path, template: Template)
 
   let context: [String: Any] = [
     "className": entity.qk_className,
+    "isAbstract": entity.isAbstract,
     "attributes": attributes,
     "entityName": entity.name ?? "Unknown",
   ]
diff --git a/share/querykit/template.swift b/share/querykit/template.swift
index b665368..6158f01 100644
--- a/share/querykit/template.swift
+++ b/share/querykit/template.swift
@@ -7,9 +7,11 @@ import QueryKit
 extension {{ className }} {{ "{" }}{% for attribute in attributes %}
   static var {{ attribute.name }}:Attribute<{{ attribute.type }}> { return Attribute("{{ attribute.name }}") }{% endfor %}
 
-  class func queryset(context:NSManagedObjectContext) -> QuerySet<{{ className }}> {
+  {% if not isAbstract %}
+  @objc class func queryset(context:NSManagedObjectContext) -> QuerySet<{{ className }}> {
     return QuerySet(context, "{{ entityName }}")
   }
+  {% endif %}
 }
 
 extension Attribute where AttributeType: {{ className }} {{ "{" }}{% for attribute in attributes %}