diff --git a/.cargo/config_fast_builds b/.cargo/config_fast_builds.toml
similarity index 84%
rename from .cargo/config_fast_builds
rename to .cargo/config_fast_builds.toml
index 1432a84b38..5993b536d5 100644
--- a/.cargo/config_fast_builds
+++ b/.cargo/config_fast_builds.toml
@@ -11,16 +11,16 @@ rustflags = ["-Clink-arg=-fuse-ld=lld", "-Zshare-generics=y"]
 # `brew install llvm`
 [target.x86_64-apple-darwin]
 rustflags = [
-    "-C",
-    "link-arg=-fuse-ld=/usr/local/opt/llvm/bin/ld64.lld",
-    "-Zshare-generics=y",
+  "-C",
+  "link-arg=-fuse-ld=/usr/local/opt/llvm/bin/ld64.lld",
+  "-Zshare-generics=y",
 ]
 
 [target.aarch64-apple-darwin]
 rustflags = [
-    "-C",
-    "link-arg=-fuse-ld=/opt/homebrew/opt/llvm/bin/ld64.lld",
-    "-Zshare-generics=y",
+  "-C",
+  "link-arg=-fuse-ld=/opt/homebrew/opt/llvm/bin/ld64.lld",
+  "-Zshare-generics=y",
 ]
 
 [target.x86_64-pc-windows-msvc]