diff --git a/scripts/install-ruby b/scripts/install-ruby
index d8e350d..b08ff9d 100755
--- a/scripts/install-ruby
+++ b/scripts/install-ruby
@@ -55,8 +55,7 @@ if [[ -d "/patches/ruby/$RUBY_VERSION" ]]; then
 fi
 
 # Compile
-export optflags="-fno-omit-frame-pointer"
-./configure --enable-shared --with-jemalloc --disable-install-doc --disable-install-rdoc --disable-install-capi
+cflags="-fno-omit-frame-pointer" ./configure --enable-shared --with-jemalloc --disable-install-doc --disable-install-rdoc --disable-install-capi
 make install -j $(nproc)
 
 # Cleanup