diff --git a/xorg/mesa/build b/xorg/mesa/build
index 9a7f79bd2..1333157d4 100755
--- a/xorg/mesa/build
+++ b/xorg/mesa/build
@@ -6,7 +6,8 @@ export CFLAGS="-DGLX_X86_READONLY_TEXT $CFLAGS"
 # Fix issues with musl and firefox.
 # https://bugs.freedesktop.org/show_bug.cgi?id=35268
 # https://github.com/mesa3d/mesa/commit/9f37c9903b87f86a533bfaffa72f0ecb285b02b2
-sed -i "/pre_args += '-DUSE_ELF_TLS'/d" meson.build
+sed "/pre_args += '-DUSE_ELF_TLS'/d" meson.build > _
+mv -f _ meson.build
 
 meson \
     --prefix=/usr \