doc: fix overriding of prefix option

Make the example in the "Building a debug build" section work as intended. Fixes: #30477 PR-URL: #30518 Reviewed-By: David Carlier <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]>
nodejs · BethGriggs · Nov 2, 2019 · Oct 31, 2019 · Oct 31, 2019 · Oct 29, 2019
commit a992135af28c859bf4014cdb987cfb45934b45b8
diff --git a/BUILDING.md b/BUILDING.md
@@ -474,7 +474,7 @@ To use the debug build with all the normal dependencies overwrite the release
 version in the install directory:
 
 ``` console
-$ make install --prefix=/opt/node-debug/
+$ make install PREFIX=/opt/node-debug/
 $ cp -a -f out/Debug/node /opt/node-debug/node
 ```