--- a/build/config/gcc/BUILD.gn
+++ b/build/config/gcc/BUILD.gn
@@ -51,16 +51,9 @@
 config("relative_paths") {
-  cflags = [
-    # This makes sure that include directories in the toolchain are
-    # represented as relative to the build directory (because that's how
-    # we invoke the compiler), rather than absolute.  This can affect
-    # __FILE__ expansions (e.g. assertions in system headers).  We
-    # normally run a compiler that's someplace within the source tree
-    # (//buildtools/...), so its absolute installation path will have a
-    # prefix matching absolute_path and hence be mapped to relative_path
-    # in the debugging information, so this should actually be
-    # superfluous for purposes of the debugging information.
-    "-no-canonical-prefixes",
-  ]
-  ldflags = [ "-no-canonical-prefixes" ]
-
+  # Dart normally uses a compiler within //buildtools.  Gentoo uses the
+  # native GCC selected by gcc-config, whose driver is reached through a
+  # symlink.  -no-canonical-prefixes prevents that driver from finding
+  # helpers such as cc1plus, so rely on GCC's normal prefix resolution.
+  cflags = []
+  ldflags = []
+
   # Remove absolute paths from the debug information.