--- CMakeLists.txt	2025-04-02 03:51:12.000000000 +0800
+++ CMakeLists.txt	2025-08-07 19:53:58.000000000 +0800
@@ -62,7 +62,7 @@
 
 project(PolySolve
         DESCRIPTION "Easy-to-use wrapper for linear solver"
-        LANGUAGES CXX)
+        LANGUAGES C CXX)
 
 if(CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "arm64" AND APPLE)
     set(POLYSOLVE_NOT_ON_APPLE_SILICON OFF)
@@ -126,11 +126,9 @@
 
 ### Configuration
 list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/polysolve/")
-list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/recipes/")
 list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/find/")
 
 # General CMake utils
-include(polysolve_cpm_cache)
 include(polysolve_use_colors)
 
 # Sort projects inside the solution
@@ -194,13 +192,6 @@
 
 # Accelerate solver (Include before Eigen)
 if(POLYSOLVE_WITH_ACCELERATE)
-    include(CPM)
-    CPMAddPackage(
-        NAME eigen
-        GIT_REPOSITORY https://gitlab.com/libeigen/eigen.git
-        GIT_TAG 969c31eefcdfaab11da763bea3f7502086673ab0
-        DOWNLOAD_ONLY ON
-    )
     set(BLA_VENDOR Apple)
     find_package(BLAS REQUIRED)
     find_package(LAPACK REQUIRED)
@@ -208,25 +199,26 @@
     target_compile_definitions(polysolve_linear PUBLIC POLYSOLVE_WITH_ACCELERATE)
 endif()
 
-include(eigen)
+find_package(Eigen3 3.3 REQUIRED NO_MODULE)
 target_link_libraries(polysolve_linear PUBLIC Eigen3::Eigen)
 
 # spdlog
-include(spdlog)
+find_package(spdlog)
 target_link_libraries(polysolve_linear PUBLIC spdlog::spdlog)
 
 # JSON (MIT)
-include(json)
+find_package(nlohmann_json)
 target_link_libraries(polysolve_linear PUBLIC nlohmann_json::nlohmann_json)
 
 # JSON Specification Engine library
-include(jse)
-target_link_libraries(polysolve_linear PUBLIC jse::jse)
+target_link_libraries(polysolve_linear PUBLIC jse)
 
 # Hypre (GNU Lesser General Public License)
 if(POLYSOLVE_WITH_HYPRE)
-    include(hypre)
+    find_package(HYPRE)
+    find_package(OpenMP)
     target_link_libraries(polysolve_linear PUBLIC HYPRE::HYPRE)
+    target_link_libraries(polysolve PUBLIC OpenMP::OpenMP_C)
     target_compile_definitions(polysolve_linear PUBLIC POLYSOLVE_WITH_HYPRE)
     if(HYPRE_WITH_MPI)
         target_compile_definitions(polysolve_linear PUBLIC HYPRE_WITH_MPI)
@@ -267,7 +259,7 @@
 
 # SuperLU solver
 if(POLYSOLVE_WITH_SUPERLU)
-    include(superlu)
+    find_package(superlu)
     if(TARGET SuperLU::SuperLU)
         target_link_libraries(polysolve_linear PRIVATE SuperLU::SuperLU)
         target_compile_definitions(polysolve_linear PUBLIC POLYSOLVE_WITH_SUPERLU)
@@ -330,12 +322,11 @@
 target_link_libraries(polysolve PUBLIC polysolve::linear)
 
 # LBFGSpp
-include(LBFGSpp)
-target_link_libraries(polysolve PRIVATE LBFGSpp::LBFGSpp)
+find_package(LBFGSpp NO_MODULE)
+target_link_libraries(polysolve PUBLIC lbfgspp)
 
 # finite-diff (include this after eigen)
-include(finite-diff)
-target_link_libraries(polysolve PRIVATE finitediff::finitediff)
+target_link_libraries(polysolve PRIVATE finitediff_finitediff)
 
 # Sanitizers
 if(POLYSOLVE_WITH_SANITIZERS)