diff --git a/build_tools/make_vendor_tarball.sh b/build_tools/make_vendor_tarball.sh
index da36462d1..93443f5df 100755
--- a/build_tools/make_vendor_tarball.sh
+++ b/build_tools/make_vendor_tarball.sh
@@ -43,7 +43,7 @@ PREFIX_TMPDIR=$(mktemp -d)
 cd "$PREFIX_TMPDIR"
 
 mkdir .cargo
-cargo vendor --manifest-path "$wd/Cargo.toml" > .cargo/config
+cargo vendor --manifest-path "$wd/Cargo.toml" > .cargo/config.toml
 
 tar cfvJ $path.xz vendor .cargo