- - echo 'deb http://archive.ubuntu.com/ubuntu/ trusty main universe' | sudo tee /etc/apt/sources.list.d/trusty.list
- - echo 'APT::Default-Release "precise";' | sudo tee /etc/apt/apt.conf.d/default-release
- - echo -e "Package: libc6\nPin: release n=trusty\nPin-Priority: 999" | sudo tee /etc/apt/preferences.d/00-libc6
- - echo -e "Package: libxkbcommon*\nPin: release n=trusty\nPin-Priority: 999" | sudo tee /etc/apt/preferences.d/01-xkbcommon
- - echo -e "Package: libyajl*\nPin: release n=trusty\nPin-Priority: 999" | sudo tee /etc/apt/preferences.d/02-yajl
- - echo -e "Package: libxcb-image*\nPin: release n=trusty\nPin-Priority: 999" | sudo tee /etc/apt/preferences.d/03-xcb-image
+ - "echo 'deb http://archive.ubuntu.com/ubuntu/ trusty main universe' | sudo tee /etc/apt/sources.list.d/trusty.list"
+ - "echo 'APT::Default-Release \"precise\";' | sudo tee /etc/apt/apt.conf.d/default-release"
+
+ - "echo 'Package: libc6' > /tmp/pin"
+ - "echo 'Pin: release n=trusty' >> /tmp/pin"
+ - "echo 'Pin-Priority: 999' >> /tmp/pin"
+ - "echo '' >> /tmp/pin"
+
+ - "echo 'Package: libxkbcommon*' >> /tmp/pin"
+ - "echo 'Pin: release n=trusty' >> /tmp/pin"
+ - "echo 'Pin-Priority: 999' >> /tmp/pin"
+ - "echo '' >> /tmp/pin"
+
+ - "echo 'Package: libyajl*' >> /tmp/pin"
+ - "echo 'Pin: release n=trusty' >> /tmp/pin"
+ - "echo 'Pin-Priority: 999' >> /tmp/pin"
+ - "echo '' >> /tmp/pin"
+
+ - "echo 'Package: libxcb-image*' >> /tmp/pin"
+ - "echo 'Pin: release n=trusty' >> /tmp/pin"
+ - "echo 'Pin-Priority: 999' >> /tmp/pin"
+ - "echo '' >> /tmp/pin"
+
+ - sudo cp /tmp/pin /etc/apt/preferences.d/trustypin