diff --git a/scripts/install b/scripts/install
index 1e2355f..0af09fc 100644
--- a/scripts/install
+++ b/scripts/install
@@ -44,8 +44,8 @@ sudo service transmission-daemon reload
 sudo yunohost service add transmission-daemon
 
 # Patch sources to add a download button
-sudo cp sources/toolbar-downloads.png /usr/share/transmission/web/style/transmission/images/toolbar-downloads.png
-sudo cat sources/ynh_common.css >> /usr/share/transmission/web/style/transmission/common.css
+sudo cp ../sources/toolbar-downloads.png /usr/share/transmission/web/style/transmission/images/toolbar-downloads.png
+sudo bash -c 'cat ../sources/ynh_common.css >> /usr/share/transmission/web/style/transmission/common.css'
 sudo sed -i "s@<div id=\"toolbar-inspector\" title=\"Toggle Inspector\"></div>@<div id=\"toolbar-inspector\" title=\"Toggle Inspector\"></div><div id=\"toolbar-separator\"></div><a href=\"../../downloads/\" id=\"toolbar-downloads\" title=\"Downloads\"></a>@g" /usr/share/transmission/web/index.html
 
 # Configure Nginx and reload
diff --git a/scripts/upgrade b/scripts/upgrade
index ab7217f..a707e51 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -25,8 +25,8 @@ sudo cp ../conf/settings.json /etc/transmission-daemon/settings.json
 sudo service transmission-daemon reload
 
 # Patch sources to add a download button
-sudo cp sources/toolbar-downloads.png /usr/share/transmission/web/style/transmission/images/toolbar-downloads.png
-sudo cat sources/ynh_common.css >> /usr/share/transmission/web/style/transmission/common.css
+sudo cp ../sources/toolbar-downloads.png /usr/share/transmission/web/style/transmission/images/toolbar-downloads.png
+sudo bash -c 'cat ../sources/ynh_common.css >> /usr/share/transmission/web/style/transmission/common.css'
 sudo sed -i "s@<div id=\"toolbar-inspector\" title=\"Toggle Inspector\"></div>@<div id=\"toolbar-inspector\" title=\"Toggle Inspector\"></div><div id=\"toolbar-separator\"></div><a href=\"../../downloads/\" id=\"toolbar-downloads\" title=\"Downloads\"></a>@g" /usr/share/transmission/web/index.html
 
 # Configure Nginx and reload