diff --git a/Sources/ScipioKit/Producer/Cache/CacheSystem.swift b/Sources/ScipioKit/Producer/Cache/CacheSystem.swift
index 27230098..a3842ec6 100644
--- a/Sources/ScipioKit/Producer/Cache/CacheSystem.swift
+++ b/Sources/ScipioKit/Producer/Cache/CacheSystem.swift
@@ -96,8 +96,10 @@ extension PinsStore.PinState: @retroactive Hashable {
 }
 
 public struct SwiftPMCacheKey: CacheKey {
-    public var targetName: String
+    /// The canonical repository URL the manifest was loaded from, for local packages only.
+    public var localPackageCanonicalLocation: String?
     public var pin: PinsStore.PinState
+    public var targetName: String
     var buildOptions: BuildOptions
     public var clangVersion: String
     public var xcodeVersion: XcodeVersion
@@ -230,8 +232,18 @@ struct CacheSystem: Sendable {
     }
 
     func calculateCacheKey(of target: CacheTarget) async throws -> SwiftPMCacheKey {
+        let package = target.buildProduct.package
+
+        let localPackageCanonicalLocation: String? = switch package.manifest.packageKind {
+        case .fileSystem, .localSourceControl:
+            package.manifest.canonicalPackageLocation.description
+        case .root, .remoteSourceControl, .registry:
+            nil
+        }
+
+        let pin = try retrievePin(package: package)
+
         let targetName = target.buildProduct.target.name
-        let pin = try retrievePin(package: target.buildProduct.package)
         let buildOptions = target.buildOptions
         guard let clangVersion = try await ClangChecker().fetchClangVersion() else {
             throw Error.compilerVersionNotDetected
@@ -240,8 +252,9 @@ struct CacheSystem: Sendable {
             throw Error.xcodeVersionNotDetected
         }
         return SwiftPMCacheKey(
-            targetName: targetName,
+            localPackageCanonicalLocation: localPackageCanonicalLocation,
             pin: pin.state,
+            targetName: targetName,
             buildOptions: buildOptions,
             clangVersion: clangVersion,
             xcodeVersion: xcodeVersion,
diff --git a/Tests/ScipioKitTests/CacheSystemTests.swift b/Tests/ScipioKitTests/CacheSystemTests.swift
index 72ab3327..44e73b64 100644
--- a/Tests/ScipioKitTests/CacheSystemTests.swift
+++ b/Tests/ScipioKitTests/CacheSystemTests.swift
@@ -2,6 +2,7 @@ import Foundation
 @testable import ScipioKit
 import XCTest
 import Basics
+import struct PackageModel.CanonicalPackageLocation
 
 private let fixturePath = URL(fileURLWithPath: #filePath)
     .deletingLastPathComponent()
@@ -19,8 +20,9 @@ final class CacheSystemTests: XCTestCase {
 
     func testEncodeCacheKey() throws {
         let cacheKey = SwiftPMCacheKey(
-            targetName: "MyTarget",
+            localPackageCanonicalLocation: "/path/to/MyPackage",
             pin: .revision("111111111"),
+            targetName: "MyTarget",
             buildOptions: .init(
                 buildConfiguration: .release,
                 isDebugSymbolsEmbedded: false,
@@ -64,6 +66,7 @@ final class CacheSystemTests: XCTestCase {
             ]
           },
           "clangVersion" : "clang-1400.0.29.102",
+          "localPackageCanonicalLocation" : "\\/path\\/to\\/MyPackage",
           "pin" : {
             "revision" : "111111111"
           },
@@ -78,6 +81,82 @@ final class CacheSystemTests: XCTestCase {
         XCTAssertEqual(rawString, expected)
     }
 
+    func testCacheKeyForRemoteAndLocalPackageDifference() async throws {
+        let fileSystem = localFileSystem
+
+        let tempDir = try fileSystem.tempDirectory.appending(#function)
+        try fileSystem.removeFileTree(tempDir)
+        try fileSystem.createDirectory(tempDir)
+
+        defer { try? fileSystem.removeFileTree(tempDir) }
+
+        let tempCacheKeyTestsDir = tempDir.appending(component: "CacheKeyTests").scipioAbsolutePath
+        try fileSystem.copy(
+            from: fixturePath.appending(component: "CacheKeyTests").absolutePath,
+            to: tempCacheKeyTestsDir
+        )
+
+        // For local package consumption
+        let executor = ProcessExecutor()
+        _ = try await executor.execute([
+            "git",
+            "clone",
+            "https://github.com/giginet/scipio-testing",
+            tempDir.appending(component: "scipio-testing").pathString,
+            "-b",
+            "3.0.0",
+            "--depth",
+            "1",
+        ])
+
+        func scipioTestingCacheKey(fixture: String) async throws -> SwiftPMCacheKey {
+            let descriptionPackage = try DescriptionPackage(
+                packageDirectory: tempCacheKeyTestsDir.appending(component: fixture),
+                mode: .createPackage,
+                onlyUseVersionsFromResolvedFile: false
+            )
+            let package = descriptionPackage
+                .graph
+                .packages
+                .first { $0.manifest.displayName == "scipio-testing" }!
+            let target = package.modules.first { $0.name == "ScipioTesting" }!
+            let cacheTarget = CacheSystem.CacheTarget(
+                buildProduct: BuildProduct(
+                    package: package,
+                    target: target
+                ),
+                buildOptions: BuildOptions(
+                    buildConfiguration: .release,
+                    isDebugSymbolsEmbedded: false,
+                    frameworkType: .dynamic,
+                    sdks: [.iOS, .iOSSimulator],
+                    extraFlags: nil,
+                    extraBuildParameters: nil,
+                    enableLibraryEvolution: false,
+                    keepPublicHeadersStructure: false,
+                    customFrameworkModuleMapContents: nil
+                )
+            )
+
+            let cacheSystem = CacheSystem(
+                pinsStore: try descriptionPackage.workspace.pinsStore.load(),
+                outputDirectory: FileManager.default.temporaryDirectory.appendingPathComponent("XCFrameworks")
+            )
+            return try await cacheSystem.calculateCacheKey(of: cacheTarget)
+        }
+
+        let scipioTestingRemote = try await scipioTestingCacheKey(fixture: "AsRemotePackage")
+        let scipioTestingLocal = try await scipioTestingCacheKey(fixture: "AsLocalPackage")
+
+        XCTAssertNil(scipioTestingRemote.localPackageCanonicalLocation)
+        XCTAssertEqual(
+            scipioTestingLocal.localPackageCanonicalLocation,
+            CanonicalPackageLocation(tempDir.appending(component: "scipio-testing").pathString).description
+        )
+        XCTAssertEqual(scipioTestingRemote.targetName, scipioTestingLocal.targetName)
+        XCTAssertEqual(scipioTestingRemote.pin, scipioTestingLocal.pin)
+    }
+
     func testCacheKeyCalculationForRootPackageTarget() async throws {
         let fileSystem = localFileSystem
         let testingPackagePath = fixturePath.appendingPathComponent("TestingPackage")
diff --git a/Tests/ScipioKitTests/Resources/Fixtures/CacheKeyTests/AsLocalPackage/Package.swift b/Tests/ScipioKitTests/Resources/Fixtures/CacheKeyTests/AsLocalPackage/Package.swift
new file mode 100644
index 00000000..31606334
--- /dev/null
+++ b/Tests/ScipioKitTests/Resources/Fixtures/CacheKeyTests/AsLocalPackage/Package.swift
@@ -0,0 +1,25 @@
+// swift-tools-version: 6.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "AsLocalPackage",
+    products: [
+        .library(
+            name: "Foo",
+            targets: ["Foo"]
+        ),
+    ],
+    dependencies: [
+        .package(path: "../../scipio-testing"),
+    ],
+    targets: [
+        .target(
+            name: "Foo",
+            dependencies: [
+                .product(name: "ScipioTesting", package: "scipio-testing"),
+            ]
+        ),
+    ]
+)
diff --git a/Tests/ScipioKitTests/Resources/Fixtures/CacheKeyTests/AsLocalPackage/Sources/Foo/Foo.swift b/Tests/ScipioKitTests/Resources/Fixtures/CacheKeyTests/AsLocalPackage/Sources/Foo/Foo.swift
new file mode 100644
index 00000000..e69de29b
diff --git a/Tests/ScipioKitTests/Resources/Fixtures/CacheKeyTests/AsRemotePackage/Package.swift b/Tests/ScipioKitTests/Resources/Fixtures/CacheKeyTests/AsRemotePackage/Package.swift
new file mode 100644
index 00000000..a8ce894f
--- /dev/null
+++ b/Tests/ScipioKitTests/Resources/Fixtures/CacheKeyTests/AsRemotePackage/Package.swift
@@ -0,0 +1,25 @@
+// swift-tools-version: 6.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "AsRemotePackage",
+    products: [
+        .library(
+            name: "Foo",
+            targets: ["Foo"]
+        ),
+    ],
+    dependencies: [
+        .package(url: "https://github.com/giginet/scipio-testing.git", exact: "3.0.0"),
+    ],
+    targets: [
+        .target(
+            name: "Foo",
+            dependencies: [
+                .product(name: "ScipioTesting", package: "scipio-testing"),
+            ]
+        ),
+    ]
+)
diff --git a/Tests/ScipioKitTests/Resources/Fixtures/CacheKeyTests/AsRemotePackage/Sources/Foo/Foo.swift b/Tests/ScipioKitTests/Resources/Fixtures/CacheKeyTests/AsRemotePackage/Sources/Foo/Foo.swift
new file mode 100644
index 00000000..e69de29b