"error: Recursion in main target references" when upgrading to 1.76.0

In vcpkg every boost lib is its own lib, so we do not clone the boost meta repo recursively and build the whole thing. Every lib is cloned and build separately (outside of the boost tree).

One problem is that some libs like nowide imports files from outside the repository like [here](https://github.com/boostorg/nowide/blob/8c18f90c7a9a4791424218b570e060d4a460983f/build/Jamfile.v2#L11)
Until now it was possible to workaround that by changing the import location and copying the necessary files:
```cmake
file(READ "${SOURCE_PATH}/build/Jamfile.v2" _contents)
string(REPLACE "import ../../config/checks/config" "import config/checks/config" _contents "${_contents}")
string(REPLACE "check-target-builds ../config//cxx11_moveable_fstreams" "check-target-builds ../check_movable_fstreams.cpp" _contents "${_contents}")
string(REPLACE "check-target-builds ../config//lfs_support" "check-target-builds ../check_lfs_support.cpp" _contents "${_contents}")
file(WRITE "${SOURCE_PATH}/build/Jamfile.v2" "${_contents}")
file(COPY "${CURRENT_INSTALLED_DIR}/share/boost-config/checks" DESTINATION "${SOURCE_PATH}/build/config")
file(COPY "${SOURCE_PATH}/config/check_lfs_support.cpp" "${SOURCE_PATH}/config/check_movable_fstreams.cpp" DESTINATION "${SOURCE_PATH}/build/config")
```

But now with boost build 1.76.0 we get the following error:
```
[1/2] cd /Users/xx/vcpkg/buildtrees/boost-nowide/src/ost-1.75.0-21f8bbc965.clean/build && /Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/b2 --user-config=/Users/xx/vcpkg/buildtrees/boost-nowide/x64-osx-rel/user-config.jam --stagedir=/Users/xx/vcpkg/buildtrees/boost-nowide/x64-osx-rel/stage --build-dir=/Users/xx/vcpkg/buildtrees/boost-nowide/x64-osx-rel cxxstd=11 runtime-link=static link=static address-model=64 architecture=x86 target-os=darwin toolset=clang threadapi=pthread -sZLIB_BINARY=z -sZLIB_LIBPATH="/Users/xx/vcpkg_installed/x64-osx/lib/libz.a" -sBZIP2_BINARY=bz2 -sBZIP2_LIBPATH="/Users/xx/vcpkg_installed/x64-osx/lib/libbz2.a" variant=release --layout=system --with-atomic --with-random --with-date_time --with-filesystem --with-system --with-thread --with-chrono -sZLIB_INCLUDE="/Users/xx/vcpkg_installed/x64-osx/include" -sBZIP2_INCLUDE="/Users/xx/vcpkg_installed/x64-osx/include" -sICU_PATH="ICU_PATH-NOTFOUND" -j8 -sBOOST_ROOT=/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build -sBOOST_BUILD_PATH=/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build --debug-configuration --ignore-site-config --hash -q threading=multi debug-symbols=on stage
FAILED: CMakeFiles/boost
cd /Users/xx/vcpkg/buildtrees/boost-nowide/src/ost-1.75.0-21f8bbc965.clean/build && /Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/b2 --user-config=/Users/xx/vcpkg/buildtrees/boost-nowide/x64-osx-rel/user-config.jam --stagedir=/Users/xx/vcpkg/buildtrees/boost-nowide/x64-osx-rel/stage --build-dir=/Users/xx/vcpkg/buildtrees/boost-nowide/x64-osx-rel cxxstd=11 runtime-link=static link=static address-model=64 architecture=x86 target-os=darwin toolset=clang threadapi=pthread -sZLIB_BINARY=z -sZLIB_LIBPATH="/Users/xx/vcpkg_installed/x64-osx/lib/libz.a" -sBZIP2_BINARY=bz2 -sBZIP2_LIBPATH="/Users/xx/vcpkg_installed/x64-osx/lib/libbz2.a" variant=release --layout=system --with-atomic --with-random --with-date_time --with-filesystem --with-system --with-thread --with-chrono -sZLIB_INCLUDE="/Users/xx/vcpkg_installed/x64-osx/include" -sBZIP2_INCLUDE="/Users/xx/vcpkg_installed/x64-osx/include" -sICU_PATH="ICU_PATH-NOTFOUND" -j8 -sBOOST_ROOT=/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build -sBOOST_BUILD_PATH=/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build --debug-configuration --ignore-site-config --hash -q threading=multi debug-symbols=on stage
notice: found boost-build.jam at /Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/boost-build.jam
notice: loading B2 from /Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/kernel/bootstrap.jam
notice: Site configuration files will be ignored due to the
notice: --ignore-site-config command-line option.
notice: Loading explicitly specified user configuration file:
/Users/xx/vcpkg/buildtrees/boost-nowide/x64-osx-rel/user-config.jam
notice: Searching '/Users/xx/vcpkg/buildtrees/boost-nowide/x64-osx-rel' for user-config configuration file 'user-config.jam'.
notice: Loading user-config configuration file 'user-config.jam' from '/Users/xx/vcpkg/buildtrees/boost-nowide/x64-osx-rel'.
notice: will use '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++' for gcc, condition gcc-5.4.1
notice: using gcc libraries :: gcc-5.4.1 :: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib32 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib64
notice: using gcc archiver :: gcc-5.4.1 :: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar
notice: using gcc ranlib :: gcc-5.4.1 :: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib
warning: toolset gcc initialization: can not find tool windres
warning: initialized from /Users/xx/vcpkg/buildtrees/boost-nowide/x64-osx-rel/user-config.jam:22
notice: using rc compiler :: gcc-5.4.1 :: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/as
notice: [cmdline-cfg] toolset clang not previously configured; attempting to auto-configure now
notice: will use 'clang++' for clang-darwin, condition clang-12.0
Performing configuration checks

- std::fstream is moveable and swappable : yes [1]
- Has Large File Support : yes [1]
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:609: in start-building from module targets
error: Recursion in main target references
error: the following target are being built currently:
error: ../build/stage /Users/xx/vcpkg/buildtrees/boost-nowide/src/ost-1.75.0-21f8bbc965.clean/build/config/checks/cxx11_defaulted_functions /Users/xx/vcpkg/buildtrees/boost-nowide/src/ost-1.75.0-21f8bbc965.clean/build/config/checks/cxx11_noexcept /Users/xx/vcpkg/buildtrees/boost-nowide/src/ost-1.75.0-21f8bbc965.clean/build/config/checks/cxx11_rvalue_references /Users/xx/vcpkg/buildtrees/boost-nowide/src/ost-1.75.0-21f8bbc965.clean/build/config/checks/cxx11_static_assert /Users/xx/vcpkg/buildtrees/boost-nowide/src/ost-1.75.0-21f8bbc965.clean/build/config/checks/cxx11_defaulted_functions
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:776: in class@main-target.generate from module object(main-target)@1431
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:934: in targets.generate-from-reference from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:355: in builds-raw from module configure
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:457: in configure.builds from module configure
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:512: in check from module object(check-target-builds-worker)@211
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/kernel/modules.jam:107: in modules.call-in from module object(check-target-builds-worker)@211
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/util/indirect.jam:105: in indirect.call from module indirect
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/property.jam:132: in property.evaluate-conditionals-in-context from module property
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1088: in evaluate-requirements from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1122: in common-properties2 from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1018: in targets.common-properties from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1314: in class@basic-target.generate from module object(typed-target)@913
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:812: in generate-really from module object(main-target)@1479
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:784: in class@main-target.generate from module object(main-target)@1479
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:934: in targets.generate-from-reference from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:355: in builds-raw from module configure
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:457: in configure.builds from module configure
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:512: in check from module object(check-target-builds-worker)@214
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/kernel/modules.jam:107: in modules.call-in from module object(check-target-builds-worker)@214
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/util/indirect.jam:105: in indirect.call from module indirect
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/property.jam:132: in property.evaluate-conditionals-in-context from module property
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1088: in evaluate-requirements from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1122: in common-properties2 from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1018: in targets.common-properties from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1314: in class@basic-target.generate from module object(typed-target)@893
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:812: in generate-really from module object(main-target)@1474
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:784: in class@main-target.generate from module object(main-target)@1474
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:934: in targets.generate-from-reference from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:355: in builds-raw from module configure
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:457: in configure.builds from module configure
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:512: in check from module object(check-target-builds-worker)@213
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/kernel/modules.jam:107: in modules.call-in from module object(check-target-builds-worker)@213
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/util/indirect.jam:105: in indirect.call from module indirect
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/property.jam:132: in property.evaluate-conditionals-in-context from module property
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1088: in evaluate-requirements from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1122: in common-properties2 from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1018: in targets.common-properties from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1314: in class@basic-target.generate from module object(typed-target)@845
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:812: in generate-really from module object(main-target)@1462
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:784: in class@main-target.generate from module object(main-target)@1462
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:934: in targets.generate-from-reference from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:355: in builds-raw from module configure
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:457: in configure.builds from module configure
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:512: in check from module object(check-target-builds-worker)@212
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/kernel/modules.jam:107: in modules.call-in from module object(check-target-builds-worker)@212
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/util/indirect.jam:105: in indirect.call from module indirect
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/property.jam:132: in property.evaluate-conditionals-in-context from module property
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1088: in evaluate-requirements from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1122: in common-properties2 from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1018: in targets.common-properties from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1314: in class@basic-target.generate from module object(typed-target)@721
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:812: in generate-really from module object(main-target)@1431
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:784: in class@main-target.generate from module object(main-target)@1431
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:934: in targets.generate-from-reference from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:355: in builds-raw from module configure
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:457: in configure.builds from module configure
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/configure.jam:512: in check from module object(check-target-builds-worker)@211
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/kernel/modules.jam:107: in modules.call-in from module object(check-target-builds-worker)@211
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/util/indirect.jam:105: in indirect.call from module indirect
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/property.jam:132: in property.evaluate-conditionals-in-context from module property
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1088: in evaluate-requirements from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1122: in common-properties2 from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1018: in targets.common-properties from module targets
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:1314: in class@basic-target.generate from module object(install-target-class)@227
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:812: in generate-really from module object(main-target)@232
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build/targets.jam:784: in class@main-target.generate from module object(main-target)@232
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/build-system.jam:797: in load from module build-system
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/kernel/modules.jam:295: in import from module modules
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/src/kernel/bootstrap.jam:139: in boost-build from module
/Users/xx/vcpkg_installed/arm64-osx/tools/boost-build/boost-build.jam:8: in module scope from module

ninja: build stopped: subcommand failed.
```

Do you have an idea how to fix that or what has been chaneg that causes the recursion now?