--- a/debian/patches/reproducible-build.patch	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/reproducible-build.patch	2019-12-07 09:50:17.251183113 +0000
@@ -0,0 +1,15 @@
+Description: Make the build reproducible
+Author: Chris Lamb <lamby@debian.org>
+Last-Update: 2019-12-07
+
+--- node-chart.js-2.9.3+dfsg.orig/rollup.config.js
++++ node-chart.js-2.9.3+dfsg/rollup.config.js
+@@ -11,7 +11,7 @@ const input = 'src/index.js';
+ const banner = `/*!
+  * Chart.js v${pkg.version}
+  * ${pkg.homepage}
+- * (c) ${new Date().getFullYear()} Chart.js Contributors
++ * (c) ${(new Date(process.env.SOURCE_DATE_EPOCH ? (process.env.SOURCE_DATE_EPOCH * 1000) : new Date().getTime())).getFullYear()} Chart.js Contributors
+  * Released under the MIT License
+  */`;
+ 
--- a/debian/patches/series	2019-12-07 09:24:09.053762957 +0000
--- b/debian/patches/series	2019-12-07 09:50:14.286987118 +0000
@@ -1,3 +1,4 @@
 workaroud-css-generator-error.patch
 #fix-rollup-resolve-paths.patch
 fix-rollup-resolve-paths.patch
+reproducible-build.patch