diff --git a/Sources/CoreCommands/Options.swift b/Sources/CoreCommands/Options.swift
index 1a39d809ac1..6778ae33a06 100644
--- a/Sources/CoreCommands/Options.swift
+++ b/Sources/CoreCommands/Options.swift
@@ -463,7 +463,9 @@ public struct BuildOptions: ParsableArguments {
     }
 
     /// The compilation destination’s target triple.
-    @Option(name: .customLong("triple"), transform: Triple.init)
+    @Option(name: .customLong("triple"),
+            help: "Filter for selecting the target triple from a Swift SDK bundle to build with.",
+            transform: Triple.init)
     public var customCompileTriple: Triple?
 
     /// Path to the compilation destination’s SDK.
diff --git a/Sources/PackageModel/SwiftSDKs/SwiftSDK.swift b/Sources/PackageModel/SwiftSDKs/SwiftSDK.swift
index fc22efa1947..37acf83b01d 100644
--- a/Sources/PackageModel/SwiftSDKs/SwiftSDK.swift
+++ b/Sources/PackageModel/SwiftSDKs/SwiftSDK.swift
@@ -784,10 +784,16 @@ public struct SwiftSDK: Equatable {
                   let targetSwiftSDK = SwiftSDK.defaultSwiftSDK(for: targetTriple, hostSDK: hostSwiftSDK)
         {
             swiftSDK = targetSwiftSDK
-        } else if let swiftSDKSelector {
+        } else if swiftSDKSelector != nil || customCompileTriple != nil {
             do {
                 var ID: String
-                (ID, swiftSDK) = try store.selectBundle(matching: swiftSDKSelector, hostTriple: hostTriple, targetTriple: customCompileTriple)
+                if let swiftSDKSelector {
+                    (ID, swiftSDK) = try store.selectBundle(matching: swiftSDKSelector, hostTriple: hostTriple, targetTriple: customCompileTriple)
+                } else if let customCompileTriple {
+                    (ID, swiftSDK) = try store.selectBundle(matching: customCompileTriple.tripleString, hostTriple: hostTriple)
+                } else {
+                    fatalError("Neither an SDK nor a triple matched somehow.")
+                }
 
                 // Override with user's manual config
                 do {
@@ -806,7 +812,7 @@ public struct SwiftSDK: Equatable {
             } catch {
                 // If a user-installed bundle for the selector doesn't exist, check if the
                 // selector is recognized as a default SDK.
-                if let targetTriple = try? Triple(swiftSDKSelector),
+                if let targetTriple = try? customCompileTriple ?? Triple(swiftSDKSelector!),
                    let defaultSDK = SwiftSDK.defaultSwiftSDK(for: targetTriple, hostSDK: hostSwiftSDK) {
                     swiftSDK = defaultSDK
                 } else {