Document rustc_private in metadata

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/user/generated_config.adoc b/docs/user/generated_config.adoc
index 1dbf2a611..504133070 100644
--- a/docs/user/generated_config.adoc
+++ b/docs/user/generated_config.adoc
@@ -105,7 +105,7 @@
 [[rust-analyzer.runnables.cargoExtraArgs]]rust-analyzer.runnables.cargoExtraArgs (default: `[]`)::
  Additional arguments to be passed to cargo for runnables such as  tests or binaries.\nFor example, it may be `--release`.
 [[rust-analyzer.rustcSource]]rust-analyzer.rustcSource (default: `null`)::
- Path to the rust compiler sources, for usage in rustc_private projects, or "discover"  to try to automatically find it.
+ Path to the rust compiler sources, for usage in rustc_private projects, or "discover"  to try to automatically find it. Any project which uses rust-analyzer with the rustcPrivate  crates must set `[package.metadata.rust-analyzer] rustc_private=true` to use it.
 [[rust-analyzer.rustfmt.extraArgs]]rust-analyzer.rustfmt.extraArgs (default: `[]`)::
  Additional arguments to `rustfmt`.
 [[rust-analyzer.rustfmt.overrideCommand]]rust-analyzer.rustfmt.overrideCommand (default: `null`)::