diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f8d81b685..8041277594 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 * **Removed**
 * **Bug Fix**
    * FIXED: `incremental_build_tiles` script works again [#4909](https://github.com/valhalla/valhalla/pull/4909)
+   * FIXED: Fix ability to use Valhalla via cmake `add_subdirectory` [#4930](https://github.com/valhalla/valhalla/pull/4930)
 * **Enhancement**
 
 ## Release Date: 2024-10-10 Valhalla 3.5.1
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3af4452a73..46064579f6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -127,10 +127,10 @@ find_package(Threads REQUIRED)
 
 # resolve vendored libraries
 set(date_include_dir ${VALHALLA_SOURCE_DIR}/third_party/date/include)
-set(rapidjson_include_dir ${CMAKE_SOURCE_DIR}/third_party/rapidjson/include)
-set(robinhoodhashing_include_dir ${CMAKE_SOURCE_DIR}/third_party/robin-hood-hashing/src/include)
+set(rapidjson_include_dir ${VALHALLA_SOURCE_DIR}/third_party/rapidjson/include)
+set(robinhoodhashing_include_dir ${VALHALLA_SOURCE_DIR}/third_party/robin-hood-hashing/src/include)
 set(cxxopts_include_dir ${VALHALLA_SOURCE_DIR}/third_party/cxxopts/include)
-set(dirent_include_dir ${CMAKE_SOURCE_DIR}/third_party/dirent/include)
+set(dirent_include_dir ${VALHALLA_SOURCE_DIR}/third_party/dirent/include)
 if (PREFER_EXTERNAL_DEPS)
   # date
   find_package(date QUIET)
diff --git a/cmake/ValhallaPkgConfig.cmake b/cmake/ValhallaPkgConfig.cmake
index a0483c801a..6bd38190f3 100644
--- a/cmake/ValhallaPkgConfig.cmake
+++ b/cmake/ValhallaPkgConfig.cmake
@@ -48,7 +48,7 @@ function(configure_valhalla_pc)
   list(JOIN LIBS_PRIVATE " " LIBS_PRIVATE)
 
   configure_file(
-    ${CMAKE_SOURCE_DIR}/libvalhalla.pc.in
-    ${CMAKE_BINARY_DIR}/libvalhalla.pc
+    ${VALHALLA_SOURCE_DIR}/libvalhalla.pc.in
+    ${VALHALLA_BUILD_DIR}/libvalhalla.pc
     @ONLY)
 endfunction()