diff --git a/src/install.md b/src/install.md
index 1d09629..d84acd4 100644
--- a/src/install.md
+++ b/src/install.md
@@ -30,6 +30,15 @@ Synit builds upon many existing technologies, but primarily relies on the follow
 
  - Make, a C compiler, and so on; standard Unix programming tools.
 
+ - Docker (containers are used frequently for (cross-)building of Alpine packages, among other
+   things!)
+
+ - The `preserves-tool` binary installed on your `PATH`:
+
+   ```
+   cargo install preserves-tools
+   ```
+
  - <a id="binfmt"></a>For cross builds (e.g. the very common case of building for `aarch64` on
    an `x86_64` host), `qemu` and its `binfmt` support. On Debian, `apt install binfmt-support
    qemu-user-static`. (**NB.** Version `1:7.0+dfsg-7` of `qemu-user-static` has a bug (possibly