diff --git a/depends/README.md b/depends/README.md
index bdc2cd9a9..14765ca1d 100644
--- a/depends/README.md
+++ b/depends/README.md
@@ -1,138 +1,138 @@
 ### Usage
 
 To build dependencies for the current arch+OS:
 
     make
 
 To build for another arch/OS:
 
     make build-<platform>
 
 Where `<platform>` is one of the following:
  - linux64
  - linux32
  - linux-arm
  - linux-aarch64
  - osx
  - win64
 
 For example, building the dependencies for macOS:
 
     make build-osx
 
 Note that it will use all the CPU cores available on the machine by default.
 This behavior can be changed by setting the `JOBS` environment variable (see
 below).
 
 To use the dependencies for building Bitcoin ABC, you need to set the platform
 file to be used by `cmake`.
 The platform files are located under `cmake/platforms/`.
 For example, cross-building for macOS (run from the project root):
 
     mkdir build_osx
     cd build_osx
     cmake -GNinja .. -DCMAKE_TOOLCHAIN_FILE=../cmake/platforms/OSX.cmake
     ninja
 
 No other options are needed, the paths are automatically configured.
 
 ### Install the required dependencies: Ubuntu & Debian
 
 #### Common to all arch/OS
 
     sudo apt-get install build-essential autoconf automake cmake curl git libtool ninja-build patch pkg-config python3
 
 #### For macOS cross compilation
 
     sudo apt-get install imagemagick libbz2-dev libcap-dev librsvg2-bin libtiff-tools libtinfo5 python3-setuptools
 
 #### For Win64 cross compilation
 
 - see [build-windows.md](../doc/build-windows.md#cross-compilation-for-ubuntu-and-windows-subsystem-for-linux)
 
 #### For linux cross compilation
 
 Common linux dependencies:
 
     sudo apt-get install gperf
 
 For linux 32 bits cross compilation:
 
 First add the i386 architecture to `dpkg`:
 
     sudo dpkg --add-architecture i386
     sudo apt-get update
 
 Then install the dependencies:
 
     sudo apt-get install lib32stdc++-8-dev libc6-dev:i386
 
 For linux ARM cross compilation:
 
     sudo apt-get install g++-arm-linux-gnueabihf
 
 For linux AARCH64 cross compilation:
 
     sudo apt-get install g++-aarch64-linux-gnu
 
 
 ### Dependency Options
 
 The following can be set when running make: `make FOO=bar`
 
 <dl>
 <dt>SOURCES_PATH</dt>
 <dd>downloaded sources will be placed here</dd>
 <dt>BASE_CACHE</dt>
 <dd>built packages will be placed here</dd>
 <dt>SDK_PATH</dt>
 <dd>Path where sdk's can be found (used by macOS)</dd>
 <dt>FALLBACK_DOWNLOAD_PATH</dt>
 <dd>If a source file can't be fetched, try here before giving up</dd>
 <dt>NO_QT</dt>
 <dd>Don't download/build/cache qt and its dependencies</dd>
 <dt>NO_QR</dt>
 <dd>Don't download/build/cache packages needed for enabling qrencode</dd>
 <dt>NO_ZMQ</dt>
 <dd>Don't download/build/cache packages needed for enabling zeromq</dd>
 <dt>NO_WALLET</dt>
 <dd>Don't download/build/cache libs needed to enable the wallet</dd>
 <dt>NO_UPNP</dt>
 <dd>Don't download/build/cache packages needed for enabling upnp</dd>
 <dt>NO_JEMALLOC</dt>
 <dd>Don't download/build/cache jemalloc</dd>
 <dt>DEBUG</dt>
 <dd>disable some optimizations and enable more runtime checking</dd>
 <dt>NO_PROTOBUF</dt>
 <dd>Don't download/build/cache protobuf (used for BIP70 support)</dd>
 <dt>HOST_ID_SALT</dt>
 <dd>Optional salt to use when generating host package ids</dd>
 <dt>BUILD_ID_SALT</dt>
 <dd>Optional salt to use when generating build package ids</dd>
 <dt>JOBS</dt>
 <dd>Number of jobs to use for each package build</dd>
 <dt>FORCE_USE_SYSTEM_CLANG</dt>
-<dd>(EXPERTS ONLY) When cross-compiling for macOS, use clang found in the
- system's <code>$PATH</code> rather than the default prebuilt release of clang
- from llvm.org</dd>
+<dd>(EXPERTS ONLY) When cross-compiling for macOS, use Clang found in the
+ system's <code>$PATH</code> rather than the default prebuilt release of Clang
+ from llvm.org. Clang 8 or later is required.</dd>
 </dl>
 
 If some packages are not built, for example by building the depends with
 `make NO_WALLET=1`, the appropriate options should be set when building Bitcoin
 ABC using these dependencies.
 In this example, `-DBUILD_BITCOIN_WALLET=OFF` should be passed to the `cmake`
 command line to ensure that the build will not fail due to missing dependencies.
 
 Additional targets:
 
     download: run 'make download' to fetch all sources without building them
     download-osx: run 'make download-osx' to fetch all sources needed for macOS builds
     download-win: run 'make download-win' to fetch all sources needed for win builds
     download-linux: run 'make download-linux' to fetch all sources needed for linux builds
     build-all: build the dependencies for all the arch/OS
 
 ### Other documentation
 
 - [description.md](description.md): General description of the depends system
 - [packages.md](packages.md): Steps for adding packages