Installing Aseprite from source can be a pain, which is why the developer offers a paid prepackaged solution here. This is a tutorial for those who want to test new features and install it from source, and maybe provide feedback to the developer.
Update 2015-05-07: There's a GitHub release 22 days ago which compiles properly in Ubuntu 15.04 (have not tested in other distros). You can see it here Aseprite v1.1-beta2. So during git checkout, use this stage:
cd aseprite && git checkout 849e40b0f950d5bb2519e42f1d9237d96c942c3d
Installing Aseprite from the Ubuntu 14.10 repository gives you a version which has issues. Instead, we'll install it from GitHub.
Install git and prerequisites if not available:
$ sudo apt-get install git cmake libx11-dev && sudo apt-get build-dep aseprite
Clone the Aseprite master repository and its dependencies:
$ git clone --recursive https://github.com/aseprite/aseprite.git
Since the developer makes all his changes on the master branch, it can cause problems in linux therefore I chose a stage which contains fixes for linux compilation: https://github.com/aseprite/aseprite/commit/85c569b2f16acc8b0f927e04d0f59f6915b80a6e
cd aseprite && git checkout 85c569b2f16acc8b0f927e04d0f59f6915b80a6e
Separate the compiled program into 'build' directory from the source code:
mkdir build && cd build
Specify generator to know what build it needs to make a makefile for, this will check available libraries on your computer:
cmake .. -G "Unix Makefiles"
Create makefile to build the software:
That's it, now Aseprite will be installed under aseprite/build/bin/. Execute aseprite in that directory to open the program.
Official Aseprite GitHub install: https://github.com/aseprite/aseprite/blob/master/INSTALL.md