diff --git a/scala.spec b/scala.spec
index 4f20701..d6fde25 100644
--- a/scala.spec
+++ b/scala.spec
@@ -167,7 +167,7 @@ sed -i '/is not supported by/d' build.xml
 sed -i '/exec.*pull-binary-libs.sh/d' build.xml
 
 %if %{with bootstrap}
-%global do_bootstrap -DdoBootstrapBuild=yes -Dlocker.skip=1
+%global do_bootstrap -DdoBootstrapBuild=yes -Dlocker.skip=1 -Dscalac.args=-verbose
 %global docs_target %{nil}
 tar -xzvf %{SOURCE2}
 %if %{want_jdk8}
@@ -205,9 +205,9 @@ chmod 755 tools/get-scala-*
 
 %build
 
-export ANT_OPTS="%{do_bootstrap}"
+export ANT_OPTS="-Xms2048m -Xmx2048m %{do_bootstrap}"
 
-%ant -v build %{docs_target} || exit 1
+%ant build %{docs_target} || exit 1
 pushd build/pack/lib
 mv scala-library.jar scala-library.jar.no
 bnd wrap --properties %{SOURCE1} --output scala-library.jar \