docker pull immortalwrt/opde:sdk
docker run -it --rm immortalwrt/opde:sdk zsh # or bash
export http_proxy= # [your proxy], do not use localhost or 127.0.0.1
export https_proxy=$http_proxy
opde feeds && opde config -a
make package/feeds/packages/libssh2/compile -j$(nproc) || make package/feeds/packages/libssh2/compile V=s

CMake Deprecation Warning at CMakeLists.txt:36 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- The C compiler identification is GNU 8.4.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /openwrt/staging_dir/toolchain-aarch64_cortex-a53_gcc-8.4.0_musl/bin/aarch64-openwrt-linux-musl-gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
CMake Error at /openwrt/staging_dir/host/share/cmake-3.21/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the
  system variable OPENSSL_ROOT_DIR (missing: OPENSSL_CRYPTO_LIBRARY
  OPENSSL_INCLUDE_DIR)
Call Stack (most recent call first):
  /openwrt/staging_dir/host/share/cmake-3.21/Modules/FindPackageHandleStandardArgs.cmake:594 (_FPHSA_FAILURE_MESSAGE)
  /openwrt/staging_dir/host/share/cmake-3.21/Modules/FindOpenSSL.cmake:574 (find_package_handle_standard_args)
  src/CMakeLists.txt:63 (find_package)


-- Configuring incomplete, errors occurred!
See also "/openwrt/build_dir/target-aarch64_cortex-a53_musl/libssh2-1.9.0/CMakeFiles/CMakeOutput.log".
make[3]: *** [Makefile:79: /openwrt/build_dir/target-aarch64_cortex-a53_musl/libssh2-1.9.0/.configured_451c39bbbb91bb33f27a3ad32c41e8a3] Error 1