diff --git a/doc/packages/build-support.md b/doc/packages/build-support.md
index cf6a133847537..80392f4d121e1 100644
--- a/doc/packages/build-support.md
+++ b/doc/packages/build-support.md
@@ -98,5 +98,5 @@ substituteAllFiles {
 }
 ```
 
-in the resulting derivation, every instance of `@hello@` will be replaced with `there` in `$out/foo.txt` and` `$out/bar.txt`; `baz.txt` will not be processed nor will it appear in `$out`.
+in the resulting derivation, every instance of `@hello@` will be replaced with `there` in `$out/foo.txt` and `$out/bar.txt`; `baz.txt` will not be processed nor will it appear in `$out`.
 :::