diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2139dc0..df3f30a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,58 +27,64 @@ include(CTest)
 # ============================================================================
 # Find Python
 
-find_package(Python COMPONENTS Interpreter Development)
+find_package(Python3 COMPONENTS Interpreter Development.Module)
 
 # ============================================================================
 # Build dependencies
+include(FetchContent)
 
-if(USE_SYSTEM_ABSEIL)
-  # Version omitted, as absl only allows EXACT version matches
-  set(_absl_package_args REQUIRED)
-else()
-  set(_absl_package_args 20230125)
-endif()
-if(USE_SYSTEM_PROTOBUF)
-  set(_protobuf_package_args 4.23.3 REQUIRED)
-else()
-  set(_protobuf_package_args 4.23.3)
-endif()
-if(USE_SYSTEM_PYBIND)
-  set(_pybind11_package_args 2.11.1 REQUIRED)
-else()
-  set(_pybind11_package_args 2.11.1)
+message(CHECK_START "Checking for external dependencies")
+list(APPEND CMAKE_MESSAGE_INDENT "  ")
+
+if(NOT TARGET absl::base)
+  if(USE_SYSTEM_ABSEIL)
+    # Version omitted, as absl only allows EXACT version matches
+    set(_absl_package_args REQUIRED)
+  else()
+    set(_absl_package_args 20230125)
+  endif()
+  FetchContent_Declare(
+    absl
+    GIT_REPOSITORY "https://github.com/abseil/abseil-cpp.git"
+    GIT_TAG 20230125.3
+    FIND_PACKAGE_ARGS ${_absl_package_args} NAMES absl)
+  set(ABSL_PROPAGATE_CXX_STD ON)
+  set(ABSL_ENABLE_INSTALL ON)
+  FetchContent_MakeAvailable(absl)
 endif()
 
-set(ABSL_PROPAGATE_CXX_STD ON)
-set(ABSL_ENABLE_INSTALL ON)
+if(NOT TARGET protobuf::libprotobuf)
+  if(USE_SYSTEM_PROTOBUF)
+    set(_protobuf_package_args 4.23.3 REQUIRED)
+  else()
+    set(_protobuf_package_args 4.23.3)
+  endif()
+  FetchContent_Declare(
+    Protobuf
+    GIT_REPOSITORY "https://github.com/protocolbuffers/protobuf.git"
+    GIT_TAG v23.3
+    GIT_SUBMODULES ""
+    FIND_PACKAGE_ARGS ${_protobuf_package_args} NAMES protobuf)
+  set(protobuf_BUILD_TESTS OFF CACHE INTERNAL "")
+  FetchContent_MakeAvailable(Protobuf)
+endif()
 
-include(FetchContent)
-FetchContent_Declare(
-  absl
-  GIT_REPOSITORY "https://github.com/abseil/abseil-cpp.git"
-  GIT_TAG 20230125.3
-  FIND_PACKAGE_ARGS ${_absl_package_args} NAMES absl)
-
-# cmake-format: off
-FetchContent_Declare(
-  Protobuf
-  GIT_REPOSITORY "https://github.com/protocolbuffers/protobuf.git"
-  GIT_TAG v23.3
-  GIT_SUBMODULES ""
-  FIND_PACKAGE_ARGS ${_protobuf_package_args} NAMES protobuf)
-set(protobuf_BUILD_TESTS OFF CACHE INTERNAL "")
-# cmake-format: on
-
-FetchContent_Declare(
-  pybind11
-  GIT_REPOSITORY "https://github.com/pybind/pybind11.git"
-  GIT_TAG v2.11.1
-  FIND_PACKAGE_ARGS ${_pybind11_package_args} NAMES pybind11)
+if(NOT TARGET pybind11::pybind11_headers)
+  if(USE_SYSTEM_PYBIND)
+    set(_pybind11_package_args 2.11.1 REQUIRED)
+  else()
+    set(_pybind11_package_args 2.11.1)
+  endif()
+  FetchContent_Declare(
+    pybind11
+    GIT_REPOSITORY "https://github.com/pybind/pybind11.git"
+    GIT_TAG v2.11.1
+    FIND_PACKAGE_ARGS ${_pybind11_package_args} NAMES pybind11)
+  FetchContent_MakeAvailable(pybind11)
+endif()
 
-message(CHECK_START "Checking for external dependencies")
-list(APPEND CMAKE_MESSAGE_INDENT "  ")
-FetchContent_MakeAvailable(absl Protobuf pybind11)
 list(POP_BACK CMAKE_MESSAGE_INDENT)
+message(CHECK_PASS "found")
 
 # ============================================================================
 # pybind11_proto_utils pybind11 extension module
@@ -87,8 +93,10 @@ pybind11_add_module(
   pybind11_protobuf/proto_utils.h)
 
 target_link_libraries(
-  pybind11_proto_utils PRIVATE absl::strings protobuf::libprotobuf
-                               ${Python_LIBRARIES})
+  pybind11_proto_utils PRIVATE
+    absl::strings
+    protobuf::libprotobuf
+    Python3::Module)
 
 target_include_directories(
   pybind11_proto_utils PRIVATE ${PROJECT_SOURCE_DIR} ${protobuf_INCLUDE_DIRS}
@@ -116,10 +124,11 @@ target_link_libraries(
   absl::optional
   protobuf::libprotobuf
   pybind11::pybind11
-  ${Python_LIBRARIES})
+  Python3::Module)
 
 target_include_directories(
   pybind11_native_proto_caster
+  PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
   PRIVATE ${PROJECT_SOURCE_DIR} ${protobuf_INCLUDE_DIRS} ${protobuf_SOURCE_DIR}
           ${pybind11_INCLUDE_DIRS})
 
@@ -143,7 +152,7 @@ target_link_libraries(
   absl::optional
   protobuf::libprotobuf
   pybind11::pybind11
-  ${Python_LIBRARIES})
+  Python3::Module)
 
 target_include_directories(
   pybind11_wrapped_proto_caster