From 8ca90b2f00a16ff3048a8b3e37ad2dcb2c3c10a5 Mon Sep 17 00:00:00 2001
From: Nat Alison <1278991+tesseralis@users.noreply.github.com>
Date: Thu, 18 Jun 2020 18:40:01 -0700
Subject: [PATCH 1/2] set mimeTypes extension for Mdx type definition

---
 packages/gatsby-plugin-mdx/gatsby/source-nodes.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/gatsby-plugin-mdx/gatsby/source-nodes.js b/packages/gatsby-plugin-mdx/gatsby/source-nodes.js
index b3030f492dacd..525689945853c 100644
--- a/packages/gatsby-plugin-mdx/gatsby/source-nodes.js
+++ b/packages/gatsby-plugin-mdx/gatsby/source-nodes.js
@@ -269,6 +269,9 @@ ${e}`
       },
     },
     interfaces: [`Node`],
+    extensions: {
+      mimeTypes: options.mediaTypes,
+    },
   })
   createTypes(MdxType)
 }

From d6d2e933736c96b71c578d237ededa80c98bd4eb Mon Sep 17 00:00:00 2001
From: Nat Alison <1278991+tesseralis@users.noreply.github.com>
Date: Thu, 18 Jun 2020 18:43:36 -0700
Subject: [PATCH 2/2] whoops

---
 packages/gatsby-plugin-mdx/gatsby/source-nodes.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/gatsby-plugin-mdx/gatsby/source-nodes.js b/packages/gatsby-plugin-mdx/gatsby/source-nodes.js
index 525689945853c..249b626728383 100644
--- a/packages/gatsby-plugin-mdx/gatsby/source-nodes.js
+++ b/packages/gatsby-plugin-mdx/gatsby/source-nodes.js
@@ -270,7 +270,9 @@ ${e}`
     },
     interfaces: [`Node`],
     extensions: {
-      mimeTypes: options.mediaTypes,
+      childOf: {
+        mimeTypes: options.mediaTypes,
+      },
     },
   })
   createTypes(MdxType)