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-rw-r--r--src/bootstrap/tool.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/bootstrap/tool.rs b/src/bootstrap/tool.rs
index f1baeafe26a..815498047fd 100644
--- a/src/bootstrap/tool.rs
+++ b/src/bootstrap/tool.rs
@@ -244,6 +244,7 @@ pub fn prepare_tool_cargo(
             path.ends_with("rls") ||
             path.ends_with("clippy") ||
             path.ends_with("miri") ||
+            path.ends_with("rustbook") ||
             path.ends_with("rustfmt")
         {
             cargo.env("LIBZ_SYS_STATIC", "1");