Installing Bazel on Windows

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aria-label="Breadcrumb"> <li class="devsite-breadcrumb-item "> <a href="https://bazel.build/" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Breadcrumbs" data-value="1" track-type="globalNav" track-name="breadcrumb" track-metadata-position="1" track-metadata-eventdetail="Bazel" > Bazel </a> </li> <li class="devsite-breadcrumb-item "> <div class="devsite-breadcrumb-guillemet material-icons" aria-hidden="true"></div> <a href="https://bazel.build/start" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Breadcrumbs" data-value="2" track-type="globalNav" track-name="breadcrumb" track-metadata-position="2" track-metadata-eventdetail="" > Getting started </a> </li> <li class="devsite-breadcrumb-item "> <div class="devsite-breadcrumb-guillemet material-icons" aria-hidden="true"></div> <a href="https://bazel.build/install" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Breadcrumbs" data-value="3" track-type="globalNav" track-name="breadcrumb" track-metadata-position="3" track-metadata-eventdetail="" > Install </a> </li> </ul> <devsite-thumb-rating position="header"> </devsite-thumb-rating> </div> <devsite-feedback position="header" project-name="Bazel" product-id="5052038" bucket="https-bazel-build" context="" version="t-devsite-webserver-20250325-r00-rc03.468100743126793331" data-label="Send Feedback Button" track-type="feedback" track-name="sendFeedbackLink" track-metadata-position="header" class="nocontent" project-icon="https://www.gstatic.com/devrel-devsite/prod/vd31e3ed8994e05c7f2cd0cf68a402ca7902bb92b6ec0977d7ef2a1c699fae3f9/bazel/images/touchicon-180.png" > <button> Send feedback </button> </devsite-feedback> <h1 class="devsite-page-title" tabindex="-1"> Installing Bazel on Windows <div class="devsite-actions" data-nosnippet><devsite-feature-tooltip ack-key="AckCollectionsBookmarkTooltipDismiss" analytics-category="Site-Wide Custom Events" analytics-action-show="Callout Profile displayed" analytics-action-close="Callout Profile dismissed" analytics-label="Create Collection Callout" class="devsite-page-bookmark-tooltip nocontent" dismiss-button="true" id="devsite-collections-dropdown" dismiss-button-text="Dismiss" close-button-text="Got it"> <devsite-bookmark></devsite-bookmark> <span slot="popout-heading"> Stay organized with collections </span> <span slot="popout-contents"> Save and categorize content based on your preferences. </span> </devsite-feature-tooltip></div> </h1> <div class="devsite-page-title-meta"><devsite-view-release-notes></devsite-view-release-notes></div> <devsite-toc class="devsite-nav" depth="2" devsite-toc-embedded > </devsite-toc> <div class="devsite-article-body clearfix "> <a class="button button-with-icon" href="https://github.com/bazelbuild/bazel/issues/new?title=%5Bbazel.build%5D+Problem+with+/install/windows&template=doc_issue.yml&link=https%3A%2F%2Fbazel.build/install/windows" target="_blank"> Report an issue<span class="material-icons icon-after" aria-hidden="true" translate="no">open_in_new</span> </a> <a class="button button-with-icon" href="https://github.com/bazelbuild/bazel/tree/master/site/en/install/windows.md" target="_blank"> View source<span class="material-icons icon-after" aria-hidden="true" translate="no">open_in_new</span> </a> <span style="float: right; line-height: 36px"> <strong>Nightly</strong>   · <a href="/versions/8.1.0/install/windows">8.1</a> · <a href="/versions/8.0.0/install/windows">8.0</a> · <a href="/versions/7.6.0/install/windows">7.6</a> · <a href="/versions/7.5.0/install/windows">7.5</a> · <a href="/versions/7.4.0/install/windows">7.4</a>  </span> <p/> <p>This page describes the requirements and steps to install Bazel on Windows. It also includes troubleshooting and other ways to install Bazel, such as using Chocolatey or Scoop.</p> <h2 id="installing-bazel" data-text="Installing Bazel" tabindex="-1">Installing Bazel</h2> <p>This section covers the prerequisites, environment setup, and detailed steps during installation on Windows.</p> <h3 id="check-system" data-text="Check your system" tabindex="-1">Check your system</h3> <p>Recommended: 64 bit Windows 10, version 1703 (Creators Update) or newer</p> <p>To check your Windows version:</p> <ul> <li>Click the Start button.</li> <li>Type <code translate="no" dir="ltr">winver</code> in the search box and press Enter.</li> <li>You should see the About Windows box with your Windows version information.</li> </ul> <h3 id="install-prerequisites" data-text="Install the prerequisites" tabindex="-1">Install the prerequisites</h3> <ul> <li><a href="https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-170" class="external">Microsoft Visual C++ Redistributable</a> </li> </ul> <h3 id="download-bazel" data-text="Download Bazel" tabindex="-1">Download Bazel</h3> <p><em>Recommended</em>: <a href="/install/bazelisk">Use Bazelisk</a></p> <p>Alternatively you can:</p> <ul> <li><a href="https://github.com/bazelbuild/bazel/releases" class="external">Download the Bazel binary (<code translate="no" dir="ltr">bazel-<var translate="no">version</var>-windows-x86_64.exe</code>) from GitHub</a>.</li> <li><a href="#chocolately">Install Bazel from Chocolatey</a></li> <li><a href="#scoop">Install Bazel from Scoop</a></li> <li><a href="/install/compile-source">Build Bazel from source</a></li> </ul> <h3 id="set-environment" data-text="Set up your environment" tabindex="-1">Set up your environment</h3> <p>To make Bazel easily accessible from command prompts or PowerShell by default, you can rename the Bazel binary to <code translate="no" dir="ltr">bazel.exe</code> and add it to your default paths.</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code class="devsite-terminal" translate="no" dir="ltr"><span class="devsite-syntax-nb">set</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-nv">PATH</span><span class="devsite-syntax-o">=</span>%PATH%<span class="devsite-syntax-p">;</span><var translate="no">path<span class="devsite-syntax-w"> </span>to<span class="devsite-syntax-w"> </span>the<span class="devsite-syntax-w"> </span>Bazel<span class="devsite-syntax-w"> </span>binary</var></code></pre></devsite-code> <p>You can also change your system <code translate="no" dir="ltr">PATH</code> environment variable to make it permanent. Check out how to <a href="/configure/windows#set-environment-variables">set environment variables</a>.</p> <h3 id="done" data-text="Done" tabindex="-1">Done</h3> <p>"Success: You've installed Bazel."</p> <p>To check the installation is correct, try to run:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code class="devsite-terminal" translate="no" dir="ltr">bazel<span class="devsite-syntax-w"> </span><var translate="no">version</var></code></pre></devsite-code> <p>Next, you can check out more tips and guidance here:</p> <ul> <li><a href="#install-compilers">Installing compilers and language runtimes</a></li> <li><a href="#troubleshooting">Troubleshooting</a></li> <li><a href="/configure/windows#best-practices">Best practices on Windows</a></li> <li><a href="/start#tutorials">Tutorials</a></li> </ul> <h2 id="install-compilers" data-text="Installing compilers and language runtimes" tabindex="-1">Installing compilers and language runtimes</h2> <p>Depending on which languages you want to build, you will need:</p> <ul> <li><p><a href="https://www.msys2.org/" class="external">MSYS2 x86_64</a> </p> <p>MSYS2 is a software distro and building platform for Windows. It contains Bash and common Unix tools (like <code translate="no" dir="ltr">grep</code>, <code translate="no" dir="ltr">tar</code>, <code translate="no" dir="ltr">git</code>).</p> <p>You will need MSYS2 to build, test, or run targets that depend on Bash. Typically these are <code translate="no" dir="ltr">genrule</code>, <code translate="no" dir="ltr">sh_binary</code>, <code translate="no" dir="ltr">sh_test</code>, but there may be more (such as Starlark rules). Bazel shows an error if a build target needs Bash but Bazel could not locate it.</p></li> <li><p>Common MSYS2 packages</p> <p>You will likely need these to build and run targets that depend on Bash. MSYS2 does not install these tools by default, so you need to install them manually. Projects that depend on Bash tools in <code translate="no" dir="ltr">PATH</code> need this step (for example TensorFlow).</p> <p>Open the MSYS2 terminal and run this command:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code class="devsite-terminal" translate="no" dir="ltr">pacman<span class="devsite-syntax-w"> </span>-S<span class="devsite-syntax-w"> </span>zip<span class="devsite-syntax-w"> </span>unzip<span class="devsite-syntax-w"> </span>patch<span class="devsite-syntax-w"> </span>diffutils<span class="devsite-syntax-w"> </span>git</code></pre></devsite-code> <p>Optional: If you want to use Bazel from CMD or Powershell and still be able to use Bash tools, make sure to add <code translate="no" dir="ltr"><var translate="no">MSYS2_INSTALL_PATH</var>/usr/bin</code> to your <code translate="no" dir="ltr">PATH</code> environment variable.</p></li> <li><p><a href="https://aka.ms/buildtools" id="install-vc">Build Tools for Visual Studio 2019</a> </p> <p>You will need this to build C++ code on Windows.</p> <p>Also supported:</p> <ul> <li>Visual C++ Build Tools 2017 (or newer) and Windows 10 SDK</li> </ul></li> <li id="install-jdk"><p><a href="https://www.oracle.com/java/technologies/javase-jdk11-downloads.html" class="external">Java SE Development Kit 11 (JDK) for Windows x64</a></p> <p>You will need this to build Java code on Windows.</p> <p>Also supported: Java 8, 9, and 10</p></li> <li><p><a href="https://www.python.org/downloads/windows/" id="install-python">Python 3.6 for Windows x86-64</a> </p> <p>You will need this to build Python code on Windows.</p> <p>Also supported: Python 2.7 or newer for Windows x86-64</p></li> </ul> <h2 id="troubleshooting" data-text="Troubleshooting" tabindex="-1">Troubleshooting</h2> <h3 id="bazel_does_not_find_bash_or_bashexe" data-text="Bazel does not find Bash or bash.exe" tabindex="-1">Bazel does not find Bash or bash.exe</h3> <p><strong>Possible reasons</strong>:</p> <ul> <li><p>you installed MSYS2 not under the default install path</p></li> <li><p>you installed MSYS2 i686 instead of MSYS2 x86_64</p></li> <li><p>you installed MSYS instead of MSYS2</p></li> </ul> <p><strong>Solution</strong>:</p> <p>Ensure you installed MSYS2 x86_64.</p> <p>If that doesn't help:</p> <ol> <li><p>Go to Start Menu > Settings.</p></li> <li><p>Find the setting "Edit environment variables for your account"</p></li> <li><p>Look at the list on the top ("User variables for <username>"), and click the "New..." button below it.</p></li> <li><p>For "Variable name", enter <code translate="no" dir="ltr">BAZEL_SH</code></p></li> <li><p>Click "Browse File..."</p></li> <li><p>Navigate to the MSYS2 directory, then to <code translate="no" dir="ltr">usr\bin</code> below it.</p> <p>For example, this might be <code translate="no" dir="ltr">C:\msys64\usr\bin</code> on your system.</p></li> <li><p>Select the <code translate="no" dir="ltr">bash.exe</code> or <code translate="no" dir="ltr">bash</code> file and click OK</p></li> <li><p>The "Variable value" field now has the path to <code translate="no" dir="ltr">bash.exe</code>. Click OK to close the window.</p></li> <li><p>Done.</p> <p>If you open a new cmd.exe or PowerShell terminal and run Bazel now, it will find Bash.</p></li> </ol> <h3 id="bazel_does_not_find_visual_studio_or_visual_c" data-text="Bazel does not find Visual Studio or Visual C++" tabindex="-1">Bazel does not find Visual Studio or Visual C++</h3> <p><strong>Possible reasons</strong>:</p> <ul> <li><p>you installed multiple versions of Visual Studio</p></li> <li><p>you installed and removed various versions of Visual Studio</p></li> <li><p>you installed various versions of the Windows SDK</p></li> <li><p>you installed Visual Studio not under the default install path</p></li> </ul> <p><strong>Solution</strong>:</p> <ol> <li><p>Go to Start Menu > Settings.</p></li> <li><p>Find the setting "Edit environment variables for your account"</p></li> <li><p>Look at the list on the top ("User variables for <username>"), and click the "New..." button below it.</p></li> <li><p>For "Variable name", enter <code translate="no" dir="ltr">BAZEL_VC</code></p></li> <li><p>Click "Browse Directory..."</p></li> <li><p>Navigate to the <code translate="no" dir="ltr">VC</code> directory of Visual Studio.</p> <p>For example, this might be <code translate="no" dir="ltr">C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC</code> on your system.</p></li> <li><p>Select the <code translate="no" dir="ltr">VC</code> folder and click OK</p></li> <li><p>The "Variable value" field now has the path to <code translate="no" dir="ltr">VC</code>. Click OK to close the window.</p></li> <li><p>Done.</p> <p>If you open a new cmd.exe or PowerShell terminal and run Bazel now, it will find Visual C++.</p></li> </ol> <h2 id="install-options" data-text="Other ways to install Bazel" tabindex="-1">Other ways to install Bazel</h2> <h3 id="chocolately" data-text="Using Chocolatey" tabindex="-1">Using Chocolatey</h3> <ol> <li><p>Install the <a href="https://chocolatey.org">Chocolatey</a> package manager</p></li> <li><p>Install the Bazel package:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code class="devsite-terminal" translate="no" dir="ltr">choco<span class="devsite-syntax-w"> </span>install<span class="devsite-syntax-w"> </span>bazel</code></pre></devsite-code> <p>This command will install the latest available version of Bazel and its dependencies, such as the MSYS2 shell. This will not install Visual C++ though.</p></li> </ol> <p>See <a href="/contribute/windows-chocolatey-maintenance">Chocolatey installation and package maintenance guide</a> for more information about the Chocolatey package.</p> <h3 id="scoop" data-text="Using Scoop" tabindex="-1">Using Scoop</h3> <ol> <li><p>Install the <a href="https://scoop.sh/">Scoop</a> package manager using the following PowerShell command:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code class="devsite-terminal" translate="no" dir="ltr">iex<span class="devsite-syntax-w"> </span><span class="devsite-syntax-o">(</span>new-object<span class="devsite-syntax-w"> </span>net.webclient<span class="devsite-syntax-o">)</span>.downloadstring<span class="devsite-syntax-o">(</span><span class="devsite-syntax-s1">'https://get.scoop.sh'</span><span class="devsite-syntax-o">)</span></code></pre></devsite-code></li> <li><p>Install the Bazel package:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="Bash"><code class="devsite-terminal" translate="no" dir="ltr">scoop<span class="devsite-syntax-w"> </span>install<span class="devsite-syntax-w"> </span>bazel</code></pre></devsite-code></li> </ol> <p>See <a href="/contribute/windows-scoop-maintenance">Scoop installation and package maintenance guide</a> for more information about the Scoop package.</p> <h3 id="build-from-source" data-text="Build from source" tabindex="-1">Build from source</h3> <p>To build Bazel from scratch instead of installing, see <a href="/install/compile-source">Compiling from source</a>.</p> </div> <devsite-thumb-rating position="footer"> </devsite-thumb-rating> <devsite-feedback position="footer" project-name="Bazel" product-id="5052038" bucket="https-bazel-build" context="" version="t-devsite-webserver-20250325-r00-rc03.468100743126793331" data-label="Send Feedback Button" track-type="feedback" track-name="sendFeedbackLink" track-metadata-position="footer" class="nocontent" project-icon="https://www.gstatic.com/devrel-devsite/prod/vd31e3ed8994e05c7f2cd0cf68a402ca7902bb92b6ec0977d7ef2a1c699fae3f9/bazel/images/touchicon-180.png" > <button> Send feedback </button> </devsite-feedback> <div class="devsite-floating-action-buttons"> </div> </article> <devsite-content-footer class="nocontent"> <p>Except as otherwise noted, the content of this page is licensed under the <a href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 License</a>, and code samples are licensed under the <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache 2.0 License</a>. 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