diff --git a/helix.spec b/helix.spec
index 1e95ed3..f19048f 100644
--- a/helix.spec
+++ b/helix.spec
@@ -93,9 +93,9 @@ cp %{SOURCE2} .cargo/config.toml
 sed -e '/^\#\!\/usr\/bin\/env .*/d' -i contrib/completion/hx.*
 
 %build
-export HELIX_DISABLE_AUTO_GRAMMAR_BUILD=1
+export HELIX_DISABLE_AUTO_GRAMMAR_BUILD=true
 %{cargo_build}
-./target/release/hx --grammar build
+HELIX_RUNTIME="$PWD/runtime" ./target/release/hx --grammar build
 
 # Shell completions
 sed -i "s|hx|helix|g" contrib/completion/hx.*