diff --git a/CMakeLists.txt b/CMakeLists.txt
index 06f5395..a23a573 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -130,7 +130,9 @@ endif(MSVC)
 
 # Configure subdirectories.
 # We depend on these for later projects, so they should come first.
-add_subdirectory(third_party)
+find_package(glslang REQUIRED CONFIG)
+get_target_property(glslang_includes glslang::glslang INTERFACE_INCLUDE_DIRECTORIES)
+set(glslang_SOURCE_DIR "${glslang_includes}/glslang")
 
 add_subdirectory(libshaderc_util)
 add_subdirectory(libshaderc)
@@ -142,7 +144,7 @@ endif()
 add_custom_target(build-version
   ${Python_EXECUTABLE}
   ${CMAKE_CURRENT_SOURCE_DIR}/utils/update_build_version.py
-  ${shaderc_SOURCE_DIR} ${spirv-tools_SOURCE_DIR} ${glslang_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}/build-version.inc
+  dummy dummy dummy ${CMAKE_CURRENT_BINARY_DIR}/build-version.inc
   COMMENT "Update build-version.inc in the Shaderc build directory (if necessary).")
 
 function(define_pkg_config_file NAME LIBS)
diff --git a/utils/update_build_version.py b/utils/update_build_version.py
index b7ce5b8..fcb0432 100755
--- a/utils/update_build_version.py
+++ b/utils/update_build_version.py
@@ -120,11 +120,15 @@ def get_version_string(project, directory):
     """Returns a detailed version string for a given project with its
     directory, which consists of software version string and git description
     string."""
-    detailed_version_string_lst = [project]
-    if project != 'glslang':
-        detailed_version_string_lst.append(deduce_software_version(directory))
-    detailed_version_string_lst.append(describe(directory).replace('"', '\\"'))
-    return ' '.join(detailed_version_string_lst)
+    match project:
+        case "shaderc":
+            return "shaderc v@shaderc-version@"
+        case "spirv-tools":
+            return "spirv-tools v@spirv-tools-version@"
+        case "glslang":
+            return "glslang v@glslang-version@"
+        case _:
+            sys.exit(1)
 
 
 def main():