diff --git a/Sources/Build/BuildDescription/ClangTargetBuildDescription.swift b/Sources/Build/BuildDescription/ClangTargetBuildDescription.swift
index 09548888d5c..1387d2933f4 100644
--- a/Sources/Build/BuildDescription/ClangTargetBuildDescription.swift
+++ b/Sources/Build/BuildDescription/ClangTargetBuildDescription.swift
@@ -323,6 +323,15 @@ package final class ClangTargetBuildDescription {
             args += ["-I", toolchainResourcesPath.pathString]
         }
 
+        // suppress warnings if the package is remote
+        if self.package.isRemote {
+            args += ["-w"]
+            // `-w` (suppress warnings) and `-Werror` (warnings as errors) flags are mutually exclusive
+            if let index = args.firstIndex(of: "-Werror") {
+                args.remove(at: index)
+            }
+        }
+
         return args
     }
 
diff --git a/Tests/BuildTests/ClangTargetBuildDescriptionTests.swift b/Tests/BuildTests/ClangTargetBuildDescriptionTests.swift
index a7c4cbd6fbc..6a80831300c 100644
--- a/Tests/BuildTests/ClangTargetBuildDescriptionTests.swift
+++ b/Tests/BuildTests/ClangTargetBuildDescriptionTests.swift
@@ -22,6 +22,7 @@ final class ClangTargetBuildDescriptionTests: XCTestCase {
     func testClangIndexStorePath() throws {
         let targetDescription = try makeTargetBuildDescription("test")
         XCTAssertTrue(try targetDescription.basicArguments().contains("-index-store-path"))
+        XCTAssertFalse(try targetDescription.basicArguments().contains("-w"))
     }
 
     func testSwiftCorelibsFoundationIncludeWorkaround() throws {
@@ -45,6 +46,11 @@ final class ClangTargetBuildDescriptionTests: XCTestCase {
         XCTAssertTrue(try androidDescription.basicArguments().contains("\(androidParameters.toolchain.swiftResourcesPath!)"))
     }
 
+    func testWarningSuppressionForRemotePackages() throws {
+        let targetDescription = try makeTargetBuildDescription("test-warning-supression", usesSourceControl: true)
+        XCTAssertTrue(try targetDescription.basicArguments().contains("-w"))
+    }
+
     private func makeClangTarget() throws -> ClangTarget {
         try ClangTarget(
             name: "dummy",
@@ -70,14 +76,20 @@ final class ClangTargetBuildDescriptionTests: XCTestCase {
     }
 
     private func makeTargetBuildDescription(_ packageName: String,
-                                            buildParameters: BuildParameters? = nil) throws -> ClangTargetBuildDescription {
+                                            buildParameters: BuildParameters? = nil,
+                                            usesSourceControl: Bool = false) throws -> ClangTargetBuildDescription {
         let observability = ObservabilitySystem.makeForTesting(verbose: false)
 
-        let manifest = Manifest.createRootManifest(
-            displayName: "dummy",
-            toolsVersion: .v5,
-            targets: [try TargetDescription(name: "dummy")]
-        )
+        let manifest: Manifest
+        if usesSourceControl {
+            manifest = Manifest.createLocalSourceControlManifest(
+                displayName: packageName, path: AbsolutePath("/\(packageName)"))
+        } else {
+            manifest = Manifest.createRootManifest(
+                displayName: packageName,
+                toolsVersion: .v5,
+                targets: [try TargetDescription(name: "dummy")])
+        }
 
         let target = try makeResolvedTarget()