diff --git a/Sources/CMakeLists.txt b/Sources/CMakeLists.txt
index ef235c43f..451d59e3b 100644
--- a/Sources/CMakeLists.txt
+++ b/Sources/CMakeLists.txt
@@ -12,6 +12,31 @@
 ##
 ##===----------------------------------------------------------------------===##
 
+if(NOT SwiftFoudation_MACRO)
+  include(ExternalProject)
+  # The macros are required for building Swift-Foundation. Build them for the
+  # build machine.
+  ExternalProject_Add(FoundationMacros
+    SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/FoundationMacros"
+    INSTALL_DIR "${CMAKE_CURRENT_BINARY_DIR}/FoundationMacros"
+    CMAKE_ARGS
+      -DCMAKE_BUILD_TYPE=Release
+      -DCMAKE_Swift_COMPILER=${CMAKE_Swift_COMPILER}
+      -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
+      -DSwiftFoundation_BUILD_EXECUTABLE_MACROS=YES)
+
+  ExternalProject_Get_Property(FoundationMacros INSTALL_DIR)
+  add_library(FoundationBuildMacros INTERFACE)
+  add_dependencies(FoundationBuildMacros FoundationMacros)
+
+  if(CMAKE_HOST_WIN32)
+    set(_SwiftFoundation_HOST_EXECUTABLE_SUFFIX .exe)
+  endif()
+
+  target_compile_options(FoundationBuildMacros INTERFACE
+    "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-load-plugin-executable ${INSTALL_DIR}/bin/FoundationMacros${_SwiftFoundation_HOST_EXECUTABLE_SUFFIX}#FoundationMacros>")
+endif()
+
 add_subdirectory(_FoundationCShims)
 add_subdirectory(FoundationEssentials)
 add_subdirectory(FoundationInternationalization)
diff --git a/Sources/FoundationEssentials/CMakeLists.txt b/Sources/FoundationEssentials/CMakeLists.txt
index 235e258a4..9cbcb222b 100644
--- a/Sources/FoundationEssentials/CMakeLists.txt
+++ b/Sources/FoundationEssentials/CMakeLists.txt
@@ -55,21 +55,7 @@ if(SwiftFoundation_MACRO)
     target_compile_options(FoundationEssentials PRIVATE
         "SHELL:-plugin-path ${SwiftFoundation_MACRO}")
 else()
-    message(STATUS "SwiftFoundation_MACRO not provided, building Foundation macros locally for host")
-    # No path to Foundation macros was provided, so we must build it ourselves
-    set(FoundationMacros_BuildLocalExecutable YES)
-    FetchContent_Declare(FoundationMacros
-        SOURCE_DIR ${CMAKE_SOURCE_DIR}/Sources/FoundationMacros)
-    FetchContent_MakeAvailable(FoundationMacros)
-    add_dependencies(FoundationEssentials FoundationMacros)
-    get_target_property(MacroDIR FoundationMacros RUNTIME_OUTPUT_DIRECTORY)
-    if(CMAKE_SYSTEM_NAME STREQUAL Windows)
-        set(MacroExecutable "${MacroDIR}/FoundationMacros.exe#FoundationMacros")
-    else()
-        set(MacroExecutable "${MacroDIR}/FoundationMacros#FoundationMacros")
-    endif()
-    target_compile_options(FoundationEssentials PUBLIC
-        "SHELL:$<$<COMPILE_LANGUAGE:Swift>:-load-plugin-executable ${MacroExecutable}>")
+  target_link_libraries(FoundationEssentials PRIVATE FoundationBuildMacros)
 endif()
 
 if(CMAKE_SYSTEM_NAME STREQUAL Linux OR CMAKE_SYSTEM_NAME STREQUAL Android)
diff --git a/Sources/FoundationMacros/CMakeLists.txt b/Sources/FoundationMacros/CMakeLists.txt
index 31925224c..e8e7f50cc 100644
--- a/Sources/FoundationMacros/CMakeLists.txt
+++ b/Sources/FoundationMacros/CMakeLists.txt
@@ -26,6 +26,9 @@ endif()
 project(FoundationMacros
   LANGUAGES Swift)
 
+option(SwiftFoundation_BUILD_EXECUTABLE_MACROS
+  "Build the FoundationMacros as an executable" NO)
+
 # SwiftSyntax Dependency
 find_package(SwiftSyntax QUIET)
 if(NOT SwiftSyntax_FOUND)
@@ -41,13 +44,13 @@ else()
   message(STATUS "SwiftSyntax_DIR provided, using swift-syntax from ${SwiftSyntax_DIR}")
 endif()
 
-if(NOT FoundationMacros_BuildLocalExecutable)
-    add_library(FoundationMacros SHARED)
-    target_compile_definitions(FoundationMacros PRIVATE FOUNDATION_MACROS_LIBRARY)
-else()
+if(SwiftFoundation_BUILD_EXECUTABLE_MACROS)
     add_executable(FoundationMacros)
     target_link_libraries(FoundationMacros PUBLIC
         SwiftSyntax::SwiftCompilerPlugin)
+else()
+    add_library(FoundationMacros SHARED)
+    target_compile_definitions(FoundationMacros PRIVATE FOUNDATION_MACROS_LIBRARY)
 endif()
 
 # Parse the module as a library, even if it's an executable, because it uses an `@main` type to define its entry point.
@@ -82,8 +85,6 @@ set_target_properties(FoundationMacros PROPERTIES
     INSTALL_RPATH "$ORIGIN/../../../swift/${SWIFT_SYSTEM_NAME}:$ORIGIN/.."
     INSTALL_REMOVE_ENVIRONMENT_RPATH ON)
 
-if(NOT FoundationMacros_BuildLocalExecutable)
-    install(TARGETS FoundationMacros
-        LIBRARY DESTINATION lib/swift/host/plugins
-        RUNTIME DESTINATION bin)
-endif()
+install(TARGETS FoundationMacros
+    LIBRARY DESTINATION lib/swift/host/plugins
+    RUNTIME DESTINATION bin)