diff --git a/scripts/install b/scripts/install
index 2df1e53..30875e3 100644
--- a/scripts/install
+++ b/scripts/install
@@ -101,14 +101,15 @@ sudo mkdir -p $final_path
 # We download the sources and go to latest revision
 sudo rm -rf ./gitsources
 sudo mkdir gitsources
+sudo chmod 777 gitsources
 # We get the repository address
 URL=`sudo cat ../sources/source_url`;
 sudo git clone $URL gitsources
 # We reset to the latest known revision
-sudo cd gitsources
+cd gitsources
 SHA1=`sudo cat ../sources/source_sha1`;
-git reset --hard $SHA1
-sudo cd ..
+sudo git reset --hard $SHA1
+cd ..
 
 # We copy the sources to the destination
 sudo cp -a gitsources/* $final_path
diff --git a/scripts/upgrade b/scripts/upgrade
index 8504fd3..5c2bc0a 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -34,14 +34,15 @@ sudo mkdir -p $final_path
 # We download the sources and go to latest revision
 sudo rm -rf ./gitsources
 sudo mkdir gitsources
+sudo chmod 777 gitsources
 # We get the repository address
 URL=`sudo cat ../sources/source_url`;
 sudo git clone $URL gitsources
 # We reset to the latest known revision
-sudo cd gitsources
+cd gitsources
 SHA1=`sudo cat ../sources/source_sha1`;
-git reset --hard $SHA1
-sudo cd ..
+sudo git reset --hard $SHA1
+cd ..
 
 # Set permissions
 sudo chmod 775 -R $final_path