<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi,<div class=""><br class=""></div><div class="">I've running into an issue where I can't build Swift successfully. Right before it errors out I get the following message:</div><div class=""><br class=""></div><div class="">```</div><div class=""><div style="margin: 0px; font-size: 14px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""><unknown>:0: error: Swift does not support the SDK 'MacOSX10.11.sdk'</span></div><div style="margin: 0px; font-size: 14px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">[564/990] Generating UnicodeExtendedGraphemeClusters.cpp from UnicodeExtendedGraphemeClusters.cpp.gyb with ptr size = 8</span></div><div style="margin: 0px; font-size: 14px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">ninja: build stopped: subcommand failed.</span></div><div style="margin: 0px; font-size: 14px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">utils/build-script: fatal error: command terminated with a non-zero exit status 1, aborting</span></div></div><div class="">```</div><div class=""><br class=""></div><div class="">I've tried deleting my `build` folder and updating my repo/all dependencies, but the problem persists. It only started happening yesterday. Has anyone else seen this, or know what it means? (I don't have Xcode 8 on this machine, if that matters, and I'm running OS X 10.11.5.)</div><div class=""><br class=""></div><div class="">Best,</div><div class="">Austin</div></body></html>