diff --git a/src/etc/rust-gdb b/src/etc/rust-gdb

index b950cea79e..cbdbcc7ec3 100755

--- a/src/etc/rust-gdb

+++ b/src/etc/rust-gdb

@@ -11,8 +11,7 @@ else

 fi

 # Find out where the pretty printer Python module is

-RUSTC_SYSROOT="$("$RUSTC" --print=sysroot)"

-GDB_PYTHON_MODULE_DIRECTORY="$RUSTC_SYSROOT/lib/rustlib/etc"

+GDB_PYTHON_MODULE_DIRECTORY=$(getconf LIBDIR)/rustlib/etc

 # Run GDB with the additional arguments that load the pretty printers

 # Set the environment variable `RUST_GDB` to overwrite the call to a

diff --git a/src/etc/rust-gdbgui b/src/etc/rust-gdbgui

index 9744913b68..632aec5025 100755

--- a/src/etc/rust-gdbgui

+++ b/src/etc/rust-gdbgui

@@ -40,8 +40,7 @@ else

 fi

 # Find out where the pretty printer Python module is

-RUSTC_SYSROOT="$("$RUSTC" --print=sysroot)"

-GDB_PYTHON_MODULE_DIRECTORY="$RUSTC_SYSROOT/lib/rustlib/etc"

+GDB_PYTHON_MODULE_DIRECTORY=$(getconf LIBDIR)/rustlib/etc

 # Set the environment variable `RUST_GDB` to overwrite the call to a

 # different/specific command (defaults to `gdb`).