diff --git a/build.sh b/build.sh
index 7ff647c40..4dfcc58ed 100755
--- a/build.sh
+++ b/build.sh
@@ -53,5 +53,7 @@ dockerbuild()
 if [ ! -z "$BUILD_IN_DOCKER" ]; then
     dockerbuild $args
 else
-    $DIR/run-build.sh $args
+    # Run under sudo so we can set ulimit
+    # See https://github.com/dotnet/core-eng/issues/14808
+    sudo $DIR/run-build.sh $args
 fi
diff --git a/run-build.sh b/run-build.sh
index 3c9b27485..7ae5a88b6 100755
--- a/run-build.sh
+++ b/run-build.sh
@@ -25,6 +25,10 @@ CUSTOM_BUILD_ARGS=
 # Set nuget package cache under the repo
 [ -z $NUGET_PACKAGES ] && export NUGET_PACKAGES="$REPOROOT/.nuget/packages"
 
+# Set max number of files open, helps avoid errors during NuGet restore
+# See https://github.com/dotnet/core-eng/issues/14808
+ulimit -n 16384
+
 args=( )
 
 while [[ $# > 0 ]]; do