diff --git a/src/etc/rust-gdb b/src/etc/rust-gdb
index 9abed30ea6f7..e4bf55df3688 100755
--- a/src/etc/rust-gdb
+++ b/src/etc/rust-gdb
@@ -13,8 +13,6 @@ fi
 # Find out where the pretty printer Python module is
 RUSTC_SYSROOT="$("$RUSTC" --print=sysroot)"
 GDB_PYTHON_MODULE_DIRECTORY="$RUSTC_SYSROOT/lib/rustlib/etc"
-# Get the commit hash for path remapping
-RUSTC_COMMIT_HASH="$("$RUSTC" -vV | sed -n 's/commit-hash: \([a-zA-Z0-9_]*\)/\1/p')"
 
 # Run GDB with the additional arguments that load the pretty printers
 # Set the environment variable `RUST_GDB` to overwrite the call to a
@@ -23,6 +21,6 @@ RUST_GDB="${RUST_GDB:-gdb}"
 PYTHONPATH="$PYTHONPATH:$GDB_PYTHON_MODULE_DIRECTORY" exec ${RUST_GDB} \
   --directory="$GDB_PYTHON_MODULE_DIRECTORY" \
   -iex "add-auto-load-safe-path $GDB_PYTHON_MODULE_DIRECTORY" \
-  -iex "set substitute-path /rustc/$RUSTC_COMMIT_HASH $RUSTC_SYSROOT/lib/rustlib/src/rust" \
+  -iex "set substitute-path @BUILDDIR@ $RUSTC_SYSROOT/lib/rustlib/src/rust" \
   "$@"