diff --git a/build_as_vagrant.sh b/build_as_vagrant.sh
index b43ad14f3edd9f557d9482ca11cdea7c9659b885..a7043d7c1ab88803c3c2fa8802a91bd5bd10c120 100644
--- a/build_as_vagrant.sh
+++ b/build_as_vagrant.sh
@@ -26,7 +26,7 @@ unzip /tmp/tibbo.zip -d "/home/vagrant/.wine/drive_c/Program Files/Tibbo"
 
 # WINE extensions - max 15 minutes!
 cd /home/vagrant/.wine/drive_c
-winetricks dotnet40 corefonts &
+sudo winetricks dotnet40 corefonts &    # apparently needs sudo
 
 sleep 600
 kill -9 %2 || true