diff --git a/docs/build_instructions.md b/docs/build_instructions.md
index 49f0727..0fc4189 100644
--- a/docs/build_instructions.md
+++ b/docs/build_instructions.md
@@ -2,13 +2,32 @@
 
 ## Prerequisites for building the encoder
 
+### All platforms
+
 -   Bazel: `iamf-tools` uses the Bazel build system. See Bazel's
     [Getting started](https://bazel.build/start) page for installation
     instructions.
 -   CMake: required to build some dependencies. See CMake's
     [Download](https://cmake.org/download/) page to install.
+-   Clang 13+ or GCC 10+ for Linux-like systems or MSVC for Windows.
+
+### Additional Windows prerequisites
+
+Windows requires some additional prerequisites:
+
+-   MSYS32: See [msys2.org](https://www.msys2.org/) for installation
+    instructions.
+-   MSCV: Follow Bazel's
+    [Build on Windows](https://bazel.build/configure/windows) for installation
+    instructions.
+-   Address
+    [long path issues](https://bazel.build/configure/windows#long-path-issues)
+    by adding the following to `iamf-tools/.bazelrc` or another
+    [custom .bazelrc](https://bazel.build/run/bazelrc) file:
 
-## Building the encoder on Linux
+    `startup --output_user_root=C:/tmp`
+
+## Building the encoder
 
 Building the encoder binary:
 
@@ -24,9 +43,10 @@ bazel test -c opt //iamf/...
 
 ## Test suite
 
-[iamf/cli/testdata](../iamf/cli/testdata) covers a wide variety of IAMF features.
-These samples can be used as encoder input. After encoding the resultant `.iamf`
-files can be used to assist in testing or debugging an IAMF-compliant decoder.
+[iamf/cli/testdata](../iamf/cli/testdata) covers a wide variety of IAMF
+features. These samples can be used as encoder input. After encoding the
+resultant `.iamf` files can be used to assist in testing or debugging an
+IAMF-compliant decoder.
 
 See the separate [README.md](../iamf/cli/testdata/README.md) for further
 documentation.
@@ -63,4 +83,6 @@ documentation.
 *   `docs/` - Documentation.
 
 ## Contributing
-If you have improvements or fixes, we would love to have your contributions. See [CONTRIBUTING.md](../CONTRIBUTING.md) for details.
+
+If you have improvements or fixes, we would love to have your contributions. See
+[CONTRIBUTING.md](../CONTRIBUTING.md) for details.