docs: use less noisy build option forms

 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 6715aca..0121c6d 100644
--- a/README.md
+++ b/README.md
@@ -45,9 +45,9 @@ installed:
 
 Then run, for example:
 ```
-zig build -Drelease-safe=true --prefix /usr install
+zig build -Drelease-safe --prefix /usr install
 ```
-To enable experimental Xwayland support pass the `-Dxwayland=true` option as well.
+To enable experimental Xwayland support pass the `-Dxwayland` option as well.
 
 ## Usage