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=$http_proxy
opde feeds && opde config -a
make package/feeds/packages/clamav/compile -j$(nproc) || make package/feeds/packages/clamav/compile V=s

Applying ./patches/010-musl12x.patch using plaintext: 
patching file clamonacc/misc/fts.c
patching file clamonacc/misc/priv_fts.h
-- The C compiler identification is GNU 8.4.0
-- The CXX 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-mips_24kc_gcc-8.4.0_musl/bin/mips-openwrt-linux-musl-gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /openwrt/staging_dir/toolchain-mips_24kc_gcc-8.4.0_musl/bin/mips-openwrt-linux-musl-g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found Git: /openwrt/staging_dir/host/bin/git (found version "2.25.1") 
-- Found Libcheck: /openwrt/staging_dir/target-mips_24kc_musl/usr/include  
-- Found Python3: /openwrt/staging_dir/hostpkg/bin/python3.9 (found version "3.9.7") found components: Interpreter 
Python 3 package 'pytest' is not installed for /openwrt/staging_dir/hostpkg/bin/python3.9 and is not available in your PATH.
Failed unit tests will be easier to read if you install pytest.
Eg:  python3 -m pip install --user pytest
-- Valgrind not found.
-- Found Threads: TRUE  
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)
  CMakeLists.txt:422 (find_package)


-- Configuring incomplete, errors occurred!
See also "/openwrt/build_dir/target-mips_24kc_musl/clamav-0.104.0/CMakeFiles/CMakeOutput.log".
make[3]: *** [Makefile:131: /openwrt/build_dir/target-mips_24kc_musl/clamav-0.104.0/.configured_a17fb5ef857664f03cd0ce37cc5ea591] Error 1