Index: frontend/node_modules/postcss-flexbugs-fixes/index.js
===================================================================
--- frontend/node_modules/postcss-flexbugs-fixes/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/postcss-flexbugs-fixes/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,45 @@
+var bug4 = require('./bugs/bug4');
+var bug6 = require('./bugs/bug6');
+var bug81a = require('./bugs/bug81a');
+
+var doNothingValues = [
+  'none',
+  'auto',
+  'content',
+  'inherit',
+  'initial',
+  'unset'
+];
+
+module.exports = function(opts) {
+  var options = Object.assign({ bug4: true, bug6: true, bug81a: true }, opts);
+
+  return {
+    postcssPlugin: 'postcss-flexbugs-fixes',
+    Once: function(css, postcss) {
+      css.walkDecls(function(d) {
+        if (d.value.indexOf('var(') > -1) {
+          return;
+        }
+        if (d.value === 'none') {
+          return;
+        }
+        var values = postcss.list.space(d.value);
+        if (doNothingValues.indexOf(d.value) > 0 && values.length === 1) {
+          return;
+        }
+        if (options.bug4) {
+          bug4(d);
+        }
+        if (options.bug6) {
+          bug6(d);
+        }
+        if (options.bug81a) {
+          bug81a(d);
+        }
+      })
+    }
+  };
+};
+
+module.exports.postcss = true;