diff --git a/depends/hosts/mingw32.mk b/depends/hosts/mingw32.mk
index dcab49baae..8f9b76eec9 100644
--- a/depends/hosts/mingw32.mk
+++ b/depends/hosts/mingw32.mk
@@ -1,3 +1,7 @@
+ifneq ($(shell which $(host)-g++-posix),)
+mingw32_CXX := $(host)-g++-posix
+endif
+
mingw32_CFLAGS=-pipe
mingw32_CXXFLAGS=$(mingw32_CFLAGS)
diff --git a/doc/build-windows.md b/doc/build-windows.md
index 6d2901c424..02fa001ed3 100644
--- a/doc/build-windows.md
+++ b/doc/build-windows.md
@@ -39,27 +39,6 @@ The first step is to install the mingw-w64 cross-compilation tool chain:
sudo apt-get install g++-mingw-w64-x86-64 mingw-w64-x86-64-dev
-Next, set the default `mingw32 g++` compiler option to POSIX[1](#footnote1):
-
-```
-sudo update-alternatives --config x86_64-w64-mingw32-g++
-```
-
-After running the above command, you should see output similar to that below.
-Choose the option that ends with `posix`.
-
-```
-There are 2 choices for the alternative x86_64-w64-mingw32-g++ (providing /usr/bin/x86_64-w64-mingw32-g++).
-
- Selection Path Priority Status
-------------------------------------------------------------
- 0 /usr/bin/x86_64-w64-mingw32-g++-win32 60 auto mode
-* 1 /usr/bin/x86_64-w64-mingw32-g++-posix 30 manual mode
- 2 /usr/bin/x86_64-w64-mingw32-g++-win32 60 manual mode
-
-Press to keep the current choice[*], or type selection number:
-```
-
Once the toolchain is installed the build steps are common:
Note that for WSL the Dash Core source path MUST be somewhere in the default mount file system, for
@@ -100,13 +79,3 @@ way. This will install to `c:\workspace\dash`, for example:
You can also create an installer using:
make deploy
-
-Footnotes
----------
-
-1: Starting from Ubuntu Xenial 16.04, both the 32 and 64 bit Mingw-w64 packages install two different
-compiler options to allow a choice between either posix or win32 threads. The default option is win32 threads which is the more
-efficient since it will result in binary code that links directly with the Windows kernel32.lib. Unfortunately, the headers
-required to support win32 threads conflict with some of the classes in the C++11 standard library, in particular std::mutex.
-It's not possible to build the Dash Core code using the win32 version of the Mingw-w64 cross compilers (at least not without
-modifying headers in the Dash Core source code).