diff --git a/Sources/apk/Graph/ApkPackageGraph.swift b/Sources/apk/Graph/ApkPackageGraph.swift
index 4d7403c..134cffc 100644
--- a/Sources/apk/Graph/ApkPackageGraph.swift
+++ b/Sources/apk/Graph/ApkPackageGraph.swift
@@ -5,7 +5,7 @@
 
 import Foundation
 
-public class ApkPackageGraph {
+public struct ApkPackageGraph: ~Copyable {
   private var _nodes = [ApkPackageGraphNode]()
 
   public var nodes: [ApkPackageGraphNode] { self._nodes }
@@ -14,7 +14,7 @@ public class ApkPackageGraph {
 
   public init() {}
 
-  public func buildGraphNode(index pkgIndex: ApkIndex, providers: ApkIndexProviderCache) {
+  public mutating func buildGraphNode(index pkgIndex: ApkIndex, providers: ApkIndexProviderCache) {
     for (packageID, package) in pkgIndex.packages.enumerated() {
       let children: [ApkPackageGraphNode.ChildRef] = package.dependencies.compactMap { dependency in
         guard let providerID = providers.resolve(index: pkgIndex, requirement: dependency.requirement) else {
@@ -27,7 +27,7 @@ public class ApkPackageGraph {
         }
         return .init(constraint: .installIf, packageID: prvID, versionSpec: installIf.requirement.versionSpec)
       } */
-      self._nodes.append(.init(self,
+      self._nodes.append(.init(
         id: packageID,
         children: children
       ))
diff --git a/Sources/apk/Graph/ApkPackageGraphNode.swift b/Sources/apk/Graph/ApkPackageGraphNode.swift
index cb8c3ca..bdbaf06 100644
--- a/Sources/apk/Graph/ApkPackageGraphNode.swift
+++ b/Sources/apk/Graph/ApkPackageGraphNode.swift
@@ -13,7 +13,7 @@ public class ApkPackageGraphNode {
   @inlinable public var isShallow: Bool { self.parentIDs.isEmpty }
   @inlinable public var isDeep: Bool { self.children.isEmpty }
 
-  internal init(_ graph: ApkPackageGraph, id: Int, children: [ChildRef]) {
+  internal init(id: Int, children: [ChildRef]) {
     self.packageID = id
     self.children = children
   }
diff --git a/Sources/dpk-cli/Subcommands/DpkGraphCommand.swift b/Sources/dpk-cli/Subcommands/DpkGraphCommand.swift
index fec57e5..d0abf59 100644
--- a/Sources/dpk-cli/Subcommands/DpkGraphCommand.swift
+++ b/Sources/dpk-cli/Subcommands/DpkGraphCommand.swift
@@ -21,7 +21,7 @@ struct DpkGraphCommand: AsyncParsableCommand {
 
       timerStart = DispatchTime.now()
       let providerCache = ApkIndexProviderCache(index: pkgIndex)
-      let graph = ApkPackageGraph()
+      var graph = ApkPackageGraph()
       graph.buildGraphNode(index: pkgIndex, providers: providerCache)
       print("Graph build took \(timerStart.distance(to: .now()).seconds) seconds")