diff --git a/Dependencies.xcworkspace/xcshareddata/swiftpm/Package.resolved b/Dependencies.xcworkspace/xcshareddata/swiftpm/Package.resolved
index 99565fde..aff2bb62 100644
--- a/Dependencies.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/Dependencies.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -9,24 +9,6 @@
         "version" : "1.0.0"
       }
     },
-    {
-      "identity" : "swift-argument-parser",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/apple/swift-argument-parser",
-      "state" : {
-        "revision" : "0fbc8848e389af3bb55c182bc19ca9d5dc2f255b",
-        "version" : "1.4.0"
-      }
-    },
-    {
-      "identity" : "swift-benchmark",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/google/swift-benchmark",
-      "state" : {
-        "revision" : "8163295f6fe82356b0bcf8e1ab991645de17d096",
-        "version" : "0.1.2"
-      }
-    },
     {
       "identity" : "swift-clocks",
       "kind" : "remoteSourceControl",
diff --git a/Package.swift b/Package.swift
index bb136607..0a775eb3 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,5 +1,6 @@
-// swift-tools-version: 5.7.1
+// swift-tools-version: 5.9
 
+import CompilerPluginSupport
 import PackageDescription
 
 let package = Package(
@@ -14,16 +15,26 @@ let package = Package(
     .library(
       name: "Dependencies",
       targets: ["Dependencies"]
-    )
+    ),
+    .library(
+      name: "DependenciesMacros",
+      targets: ["DependenciesMacros"]
+    ),
   ],
   dependencies: [
-    .package(url: "https://github.com/google/swift-benchmark", from: "0.1.0"),
+    .package(url: "https://github.com/apple/swift-syntax", "509.0.0"..<"601.0.0"),
     .package(url: "https://github.com/pointfreeco/combine-schedulers", from: "1.0.0"),
     .package(url: "https://github.com/pointfreeco/swift-clocks", from: "1.0.0"),
     .package(url: "https://github.com/pointfreeco/swift-concurrency-extras", from: "1.0.0"),
     .package(url: "https://github.com/pointfreeco/xctest-dynamic-overlay", from: "1.1.0"),
   ],
   targets: [
+    .target(
+      name: "DependenciesTestObserver",
+      dependencies: [
+        .product(name: "XCTestDynamicOverlay", package: "xctest-dynamic-overlay"),
+      ]
+    ),
     .target(
       name: "Dependencies",
       dependencies: [
@@ -36,22 +47,63 @@ let package = Package(
     .testTarget(
       name: "DependenciesTests",
       dependencies: [
-        "Dependencies"
+        "Dependencies",
+        "DependenciesMacros",
       ]
     ),
-    .executableTarget(
-      name: "swift-dependencies-benchmark",
+    .target(
+      name: "DependenciesMacros",
       dependencies: [
-        "Dependencies",
-        .product(name: "Benchmark", package: "swift-benchmark"),
+        "DependenciesMacrosPlugin",
+        .product(name: "XCTestDynamicOverlay", package: "xctest-dynamic-overlay"),
+      ]
+    ),
+    .macro(
+      name: "DependenciesMacrosPlugin",
+      dependencies: [
+        .product(name: "SwiftSyntaxMacros", package: "swift-syntax"),
+        .product(name: "SwiftCompilerPlugin", package: "swift-syntax"),
       ]
     ),
   ]
 )
 
+#if !os(macOS) && !os(WASI)
+  package.products.append(
+    .library(
+      name: "DependenciesTestObserver",
+      type: .dynamic,
+      targets: ["DependenciesTestObserver"]
+    )
+  )
+#endif
+
+#if !os(WASI)
+  package.dependencies.append(
+    .package(url: "https://github.com/pointfreeco/swift-macro-testing", from: "0.2.0")
+  )
+  package.targets.append(contentsOf: [
+    .testTarget(
+      name: "DependenciesMacrosPluginTests",
+      dependencies: [
+        "DependenciesMacros",
+        "DependenciesMacrosPlugin",
+        .product(name: "MacroTesting", package: "swift-macro-testing"),
+      ]
+    ),
+  ])
+#endif
+
 #if !os(Windows)
   // Add the documentation compiler plugin if possible
   package.dependencies.append(
     .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0")
   )
 #endif
+
+for target in package.targets {
+  target.swiftSettings = target.swiftSettings ?? []
+  target.swiftSettings?.append(contentsOf: [
+    .enableExperimentalFeature("StrictConcurrency")
+  ])
+}
diff --git a/Package@swift-5.9.swift b/Package@swift-6.0.swift
similarity index 82%
rename from Package@swift-5.9.swift
rename to Package@swift-6.0.swift
index 5a3ff2a6..c5ae32d1 100644
--- a/Package@swift-5.9.swift
+++ b/Package@swift-6.0.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 5.9
+// swift-tools-version: 6.0
 
 import CompilerPluginSupport
 import PackageDescription
@@ -23,7 +23,6 @@ let package = Package(
   ],
   dependencies: [
     .package(url: "https://github.com/apple/swift-syntax", "509.0.0"..<"601.0.0"),
-    .package(url: "https://github.com/google/swift-benchmark", from: "0.1.0"),
     .package(url: "https://github.com/pointfreeco/combine-schedulers", from: "1.0.0"),
     .package(url: "https://github.com/pointfreeco/swift-clocks", from: "1.0.0"),
     .package(url: "https://github.com/pointfreeco/swift-concurrency-extras", from: "1.0.0"),
@@ -66,14 +65,8 @@ let package = Package(
         .product(name: "SwiftCompilerPlugin", package: "swift-syntax"),
       ]
     ),
-    .executableTarget(
-      name: "swift-dependencies-benchmark",
-      dependencies: [
-        "Dependencies",
-        .product(name: "Benchmark", package: "swift-benchmark"),
-      ]
-    ),
-  ]
+  ],
+  swiftLanguageVersions: [.v6]
 )
 
 #if !os(macOS) && !os(WASI)
@@ -108,15 +101,3 @@ let package = Package(
     .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0")
   )
 #endif
-
-for target in package.targets {
-  target.swiftSettings = target.swiftSettings ?? []
-  target.swiftSettings?.append(contentsOf: [
-    .enableExperimentalFeature("StrictConcurrency")
-  ])
-//  target.swiftSettings?.append(
-//    .unsafeFlags([
-//      "-enable-library-evolution",
-//    ])
-//  )
-}
diff --git a/Sources/Dependencies/Internal/RuntimeWarnings.swift b/Sources/Dependencies/Internal/RuntimeWarnings.swift
index 32b6eac1..7f92b969 100644
--- a/Sources/Dependencies/Internal/RuntimeWarnings.swift
+++ b/Sources/Dependencies/Internal/RuntimeWarnings.swift
@@ -20,7 +20,7 @@ func runtimeWarn(
       #if canImport(os)
         os_log(
           .fault,
-          dso: dso,
+          dso: dso.wrappedValue,
           log: OSLog(subsystem: "com.apple.runtime-issues", category: category),
           "%@",
           message
@@ -55,15 +55,8 @@ func runtimeWarn(
     //     To work around this, we hook into SwiftUI's runtime issue delivery mechanism, instead.
     //
     // Feedback filed: https://gist.github.com/stephencelis/a8d06383ed6ccde3e5ef5d1b3ad52bbc
-    #if swift(>=5.10)
-      @usableFromInline
-      nonisolated(unsafe) let dso = getSwiftUIDSO()
-    #else
-      @usableFromInline
-      let dso = getSwiftUIDSO()
-    #endif
-
-    private func getSwiftUIDSO() -> UnsafeMutableRawPointer {
+    @usableFromInline
+    let dso = UncheckedSendable({
       let count = _dyld_image_count()
       for i in 0..<count {
         if let name = _dyld_get_image_name(i) {
@@ -76,7 +69,7 @@ func runtimeWarn(
         }
       }
       return UnsafeMutableRawPointer(mutating: #dsohandle)
-    }
+    }())
   #elseif os(WASI)
     #if canImport(JavaScriptCore)
       import JavaScriptCore
diff --git a/Sources/swift-dependencies-benchmark/WithValue.swift b/Sources/swift-dependencies-benchmark/WithValue.swift
deleted file mode 100644
index 5056a376..00000000
--- a/Sources/swift-dependencies-benchmark/WithValue.swift
+++ /dev/null
@@ -1,78 +0,0 @@
-import Benchmark
-import Dependencies
-import Foundation
-
-let withValueSuite = BenchmarkSuite(name: "Dependencies") { suite in
-  _ = DependencyValues._current.date.now
-  _ = DependencyValues._current.calendar
-  _ = DependencyValues._current.context
-  _ = DependencyValues._current.locale
-  _ = DependencyValues._current.timeZone
-  _ = DependencyValues._current.urlSession
-  _ = DependencyValues._current.uuid
-  _ = DependencyValues._current.withRandomNumberGenerator
-  @Dependency(\.someValue) var someValue: Int
-
-  suite.benchmark("Dependency key writing") {
-    let value = withDependencies {
-      $0.someValue = 1
-    } operation: {
-      withDependencies {
-        $0.someValue = 2
-      } operation: {
-        withDependencies {
-          $0.someValue = 3
-        } operation: {
-          withDependencies {
-            $0.someValue = 4
-          } operation: {
-            withDependencies {
-              $0.someValue = 5
-            } operation: {
-              withDependencies {
-                $0.someValue = 6
-              } operation: {
-                withDependencies {
-                  $0.someValue = 7
-                } operation: {
-                  withDependencies {
-                    $0.someValue = 8
-                  } operation: {
-                    withDependencies {
-                      $0.someValue = 9
-                    } operation: {
-                      withDependencies {
-                        $0.someValue = 10
-                      } operation: {
-                        withDependencies {
-                          $0.date = .constant(Date())
-                          $0.calendar = Calendar(identifier: .gregorian)
-                          $0.context = .live
-                          $0.locale = Locale(identifier: "en_US")
-                          $0.uuid = .incrementing
-                        } operation: {
-                          someValue
-                        }
-                      }
-                    }
-                  }
-                }
-              }
-            }
-          }
-        }
-      }
-    }
-    precondition(value == 10)
-  }
-}
-
-private enum SomeValueKey: DependencyKey {
-  static let liveValue = 1
-}
-extension DependencyValues {
-  var someValue: Int {
-    get { self[SomeValueKey.self] }
-    set { self[SomeValueKey.self] = newValue }
-  }
-}
diff --git a/Sources/swift-dependencies-benchmark/main.swift b/Sources/swift-dependencies-benchmark/main.swift
deleted file mode 100644
index cef5e964..00000000
--- a/Sources/swift-dependencies-benchmark/main.swift
+++ /dev/null
@@ -1,6 +0,0 @@
-import Benchmark
-
-Benchmark.main([
-  defaultBenchmarkSuite,
-  withValueSuite,
-])
diff --git a/Tests/DependenciesTests/DependencyTests.swift b/Tests/DependenciesTests/DependencyTests.swift
index 4ccc03eb..eb28c8d8 100644
--- a/Tests/DependenciesTests/DependencyTests.swift
+++ b/Tests/DependenciesTests/DependencyTests.swift
@@ -183,30 +183,6 @@ final class DependencyTests: XCTestCase {
     XCTAssertEqual("cool", greatGrandchild.string)
   }
 
-  // NB: `@Dependency` should not be used as a `static var` because of the following behavior.
-  func testStaticDependencyCachesFirstUse() {
-    struct User {
-      @Dependency(\.uuid) static var uuid
-
-      let id: UUID
-
-      init() {
-        self.id = Self.uuid()
-      }
-    }
-
-    let user1 = withDependencies {
-      $0.uuid = .incrementing
-    } operation: {
-      User()
-    }
-
-    let user2 = User()
-
-    XCTAssertEqual(user1.id, UUID(0))
-    XCTAssertEqual(user2.id, UUID(1))
-  }
-
   func testDependencyType() {
     struct MyDependency: TestDependencyKey {
       static var testValue: Int { 0 }