diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5b96a2429e..181df0bf2d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,6 +9,8 @@
 # Minimum CMake version.  This must be in the root level CMakeLists.txt.
 cmake_minimum_required(VERSION 3.24)
 
+set(CMAKE_CXX_STANDARD 17)
+
 # These policy settings should be included before the project definition.
 include("packager/policies.cmake")
 
@@ -28,6 +30,28 @@ enable_testing()
 
 option(SKIP_INTEGRATION_TESTS "Skip the packager integration tests" OFF)
 
+find_package(absl REQUIRED)
+find_package(MbedTLS REQUIRED)
+find_package(GTest REQUIRED)
+find_package(CURL REQUIRED)
+find_package(LibXml2 REQUIRED)
+find_package(PNG REQUIRED)
+find_package(nlohmann_json REQUIRED)
+find_package(Protobuf CONFIG REQUIRED)
+find_package(webm REQUIRED)
+
+# Alias to same names as vendored dependencies
+add_library(mbedtls ALIAS MbedTLS::mbedtls)
+add_library(gmock ALIAS GTest::gmock)
+add_library(gtest ALIAS GTest::gtest)
+add_library(gtest_main ALIAS GTest::gtest_main)
+add_library(libcurl ALIAS CURL::libcurl)
+add_library(LibXml2 ALIAS LibXml2::LibXml2)
+add_library(png_static ALIAS PNG::PNG) # not static but the expected library name
+add_library(libprotobuf ALIAS protobuf::libprotobuf)
+add_executable(protoc ALIAS protobuf::protoc)
+add_library(webm ALIAS webm::webm)
+
 # Subdirectories with their own CMakeLists.txt
 add_subdirectory(packager)
 add_subdirectory(link-test)
diff --git a/packager/CMakeLists.txt b/packager/CMakeLists.txt
index 7238d243bb..722217bbc4 100644
--- a/packager/CMakeLists.txt
+++ b/packager/CMakeLists.txt
@@ -78,7 +78,6 @@ add_subdirectory(media)
 add_subdirectory(hls)
 add_subdirectory(mpd)
 add_subdirectory(status)
-add_subdirectory(third_party)
 add_subdirectory(tools)
 add_subdirectory(utils)
 add_subdirectory(version)
diff --git a/packager/tools/pssh/CMakeLists.txt b/packager/tools/pssh/CMakeLists.txt
index 9ec3a39d26..0b981cec29 100644
--- a/packager/tools/pssh/CMakeLists.txt
+++ b/packager/tools/pssh/CMakeLists.txt
@@ -14,7 +14,6 @@ set(PSSH_BOX_OUTPUTS
 
 add_custom_command(
     DEPENDS
-        protobuf_py
         widevine_protos
         pssh-box.py
     OUTPUT ${PSSH_BOX_OUTPUTS}
@@ -26,10 +25,6 @@ add_custom_command(
         ${CMAKE_BINARY_DIR}/packager/media/base/widevine_common_encryption_pb2.py
         ${CMAKE_BINARY_DIR}/packager/media/base/widevine_pssh_data_pb2.py
         ${CMAKE_BINARY_DIR}/packager/pssh-box-protos/
-    COMMAND
-        ${CMAKE_COMMAND} -E copy_directory
-        ${CMAKE_BINARY_DIR}/packager/third_party/protobuf/py/google
-        ${CMAKE_BINARY_DIR}/packager/pssh-box-protos/google
     COMMAND
         ${CMAKE_COMMAND} -E copy
         ${CMAKE_CURRENT_SOURCE_DIR}/pssh-box.py