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&lt;div&nbsp;dir=&quot;ltr&quot;&gt;I&nbsp;was&nbsp;fiddling&nbsp;with&nbsp;some&nbsp;js,&nbsp;and&nbsp;got&nbsp;tired&nbsp;of&nbsp;restarting&nbsp;the&nbsp;server.&nbsp;I&nbsp;was&nbsp;under&nbsp;the &lt;div&gt;impression&nbsp;that&nbsp;using&nbsp;dev_mode&nbsp;with&nbsp;relx&nbsp;was&nbsp;the&nbsp;solution&nbsp;to&nbsp;this&nbsp;problem,&nbsp;but &lt;/div&gt;&lt;div&gt;I&nbsp;can&#39;t&nbsp;seem&nbsp;to&nbsp;get&nbsp;it&nbsp;to&nbsp;work.&nbsp;I&nbsp;have&nbsp;an&nbsp;example&nbsp;here:&lt;/div&gt;&lt;div&gt;&lt;br&gt;&lt;a&nbsp;href=&quot;https://github.com/grahamrhay/cowboy_devmode&quot;&gt;https://github.com/grahamrhay/cowboy_devmode&lt;/a&gt;&lt;br&gt;&lt;br&gt;&lt;div&gt;If&nbsp;I&nbsp;look&nbsp;in&nbsp;_rel,&nbsp;the&nbsp;lib&nbsp;folder&nbsp;for&nbsp;my&nbsp;app&nbsp;is&nbsp;a&nbsp;symlink,&nbsp;as&nbsp;expected.&nbsp;Yet&nbsp;when&nbsp;I&nbsp;change&lt;/div&gt;&lt;div&gt;the&nbsp;web&nbsp;page,&nbsp;the&nbsp;rendered&nbsp;page&nbsp;is&nbsp;unchanged.&nbsp;I&#39;ve&nbsp;tried&nbsp;a&nbsp;hard&nbsp;reload,&nbsp;and&nbsp;clearing&lt;/div&gt;&lt;div&gt;the&nbsp;cache. &lt;/div&gt;&lt;div&gt;&lt;br&gt;&lt;/div&gt;&lt;div&gt;And,&nbsp;in&nbsp;case&nbsp;that&nbsp;wasn&#39;t&nbsp;annoying&nbsp;enough,&nbsp;even&nbsp;restarting&nbsp;the&nbsp;server&nbsp;isn&#39;t&nbsp;enough! &lt;/div&gt;&lt;div&gt;Nor&nbsp;is&nbsp;running&nbsp;make&nbsp;again.&nbsp;In&nbsp;fact,&nbsp;the&nbsp;only&nbsp;way&nbsp;I&#39;ve&nbsp;found&nbsp;of&nbsp;getting&nbsp;it&nbsp;to&nbsp;update, &lt;/div&gt;&lt;div&gt;is&nbsp;to&nbsp;turn&nbsp;off&nbsp;dev&nbsp;mode,&nbsp;and&nbsp;build&nbsp;the&nbsp;release.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;br&gt;&lt;/div&gt;&lt;div&gt;Am&nbsp;I&nbsp;missing&nbsp;something&nbsp;really&nbsp;obvious?&nbsp;As&nbsp;far&nbsp;as&nbsp;I&nbsp;can&nbsp;tell&nbsp;from&nbsp;perusing&nbsp;the&nbsp;code,&lt;/div&gt;&lt;div&gt;the&nbsp;cowboy&nbsp;static&nbsp;handler&nbsp;just&nbsp;serves&nbsp;the&nbsp;file&nbsp;directly&nbsp;from&nbsp;the&nbsp;file&nbsp;system.&lt;/div&gt;&lt;div&gt;&lt;br&gt;&lt;/div&gt;&lt;div&gt;(P.S.&nbsp;I&nbsp;am&nbsp;using&nbsp;vagrant,&nbsp;but&nbsp;I&nbsp;would&nbsp;expect&nbsp;that&nbsp;to&nbsp;cause&nbsp;errors&nbsp;rather&nbsp;than&nbsp;this,&nbsp;if &lt;/div&gt;&lt;div&gt;the&nbsp;symlink&nbsp;wasn&#39;t&nbsp;working.)&lt;/div&gt;&lt;/div&gt;<br>

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