diff --git a/docs/changelog.md b/docs/changelog.md
index 592bca5c..49495405 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -4,6 +4,12 @@
 
 Requires libvips v8.7.0.
 
+#### v0.21.1 - TBD
+
+* Install: support `sharp_dist_base_url` npm config, like existing `SHARP_DIST_BASE_URL`.
+  [#1422](https://github.com/lovell/sharp/pull/1422)
+  [@SethWen](https://github.com/SethWen)
+
 #### v0.21.0 - 4<sup>th</sup> October 2018
 
 * Deprecate the following resize-related functions:
diff --git a/docs/install.md b/docs/install.md
index 577cab02..e9d5cbea 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -218,7 +218,14 @@ you can do so via
 [https://github.com/lovell/sharp-libvips/releases](https://github.com/lovell/sharp-libvips/releases)
 
 Should you wish to install these from your own location,
-set the `SHARP_DIST_BASE_URL` environment variable, e.g.
+set the `sharp_dist_base_url` npm config option, e.g.
+
+```sh
+npm config set sharp_dist_base_url "https://hostname/path/"
+npm install sharp
+```
+
+or set the `SHARP_DIST_BASE_URL` environment variable, e.g.
 
 ```sh
 SHARP_DIST_BASE_URL="https://hostname/path/" npm install sharp