diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9eb5c044bf96f..246db6a560bdd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1711,7 +1711,7 @@ if(SWIFT_ENABLE_NEW_RUNTIME_BUILD)
         # To ensure incremental builds work as expected
         BUILD_ALWAYS 1
         CMAKE_ARGS
-          -DSwift_ENABLE_RUNTIMES=StringProcessing|Synchronization|Distributed|Observation
+          -DSwift_ENABLE_RUNTIMES=StringProcessing|Synchronization|Distributed|Observation|Runtime
           -DBUILD_SHARED_LIBS=YES
           -DCMAKE_Swift_COMPILER_WORKS:BOOLEAN=YES
           -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
@@ -1722,6 +1722,7 @@ if(SWIFT_ENABLE_NEW_RUNTIME_BUILD)
           -DCMAKE_Swift_COMPILER_TARGET:STRING=${stdlib_target_triple}
           -DCMAKE_C_COMPILER_TARGET:STRING=${stdlib_target_triple}
           -DCMAKE_CXX_COMPILER_TARGET:STRING=${stdlib_target_triple}
+          -DCMAKE_ASM_COMPILER_TARGET:STRING=${stdlib_target_triple}
           -DCMAKE_COLOR_DIAGNOSTICS:BOOLEAN=${CMAKE_COLOR_DIAGNOSTICS}
           -DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM}
           -DCMAKE_FIND_PACKAGE_PREFER_CONFIG=TRUE)
diff --git a/Runtimes/Supplemental/Runtime/CMakeLists.txt b/Runtimes/Supplemental/Runtime/CMakeLists.txt
index 099fa4945bea2..52e061a46a26c 100644
--- a/Runtimes/Supplemental/Runtime/CMakeLists.txt
+++ b/Runtimes/Supplemental/Runtime/CMakeLists.txt
@@ -43,7 +43,7 @@ set(${PROJECT_NAME}_VENDOR_MODULE_DIR "${CMAKE_SOURCE_DIR}/../cmake/modules/vend
 
 find_package(SwiftCore REQUIRED)
 find_package(SwiftOverlay REQUIRED)
-#find_package(SwiftDarwin)
+find_package(SwiftDarwin)
 
 include(GNUInstallDirs)
 
@@ -154,7 +154,7 @@ target_link_libraries(swiftRuntime PRIVATE
   swift_Concurrency
   swiftCxxStdlib
   $<$<PLATFORM_ID:Android>:swiftAndroid>
-  #$<$<PLATFORM_ID:Darwin>:swiftDarwin>
+  $<$<PLATFORM_ID:Darwin>:swiftDarwin>
   $<$<PLATFORM_ID:Linux>:swiftGlibc>
   $<$<PLATFORM_ID:Windows>:swiftWinSDK>)