diff --git a/SPECS/chromium.spec b/SPECS/chromium.spec
index 6a0b0446..8b51d4c9 100644
--- a/SPECS/chromium.spec
+++ b/SPECS/chromium.spec
@@ -1490,7 +1490,7 @@ CHROMIUM_CORE_GN_DEFINES+=' clang_use_chrome_plugins=false'
 CHROMIUM_CORE_GN_DEFINES+=' use_lld=true'
 
 # enable system rust
-CHROMIUM_CORE_GN_DEFINES+=" rust_sysroot_absolute=\"$rust_sysroot_absolute\""
+CHROMIUM_CORE_GN_DEFINES+=' rust_sysroot_absolute="%{_prefix}"'
 CHROMIUM_CORE_GN_DEFINES+=" rust_bindgen_root=\"$rust_bindgen_root\""
 CHROMIUM_CORE_GN_DEFINES+=" rustc_version=\"$rustc_version\""