Download the Eclipse Installer and select Epsilon. Note that you will need a Java Runtime Environment installed on your system.

Windows macOS Linux

Advanced Mode: If you don't see Epsilon in the list, click on the three vertical bars on the top right, then Product Catalogs and check " Applications". Epsilon should be near the bottom of the list (you can also use the search bar). If the Product Catalogs option is missing, switch to Advanced Mode and look for Epsilon under " Applications" (if this category is missing, click on the small yellow folder icon in the top right corner and select it). Keep pressing Next (you don't need to change anything) and then Finish. Accept the licenses when prompted.

Important: Please do not select the Epsilon project on the second page of the installer in Advanced Mode. This is for Epsilon developers only and may cause issues during installation of the Epsilon product.

Note for Windows users: Please make sure that you install Eclipse close to the root of a drive (e.g. C:\Users\<username>\Epsilon) as the maximum path length on Windows may not exceed 255 characters by default.


Uncheck the "Show only the latest versions of available software" check box in Eclipse's new software installation dialog and select version 1.1_SR1.


The development tools of Epsilon come as a set of Eclipse plugins and therefore, to install Epsilon you need to download and install a Java Runtime Environment and Eclipse first. The Eclipse Kepler Modeling Tools distribution contains most of the necessary prerequisites for Epsilon 1.1_SR1 and is available for the following platforms.

Windows macOS Linux

Dependencies (optional)

Below are optional dependencies that are not pre-installed in the Eclipse Kepler Modeling Tools distribution.

DependencyUpdate siteNotes
Emfatic Untick the " Group items by category " check box

EpsilonLabs (optional)

Some of the projects found in the EpsilonLabs repository can be installed from the EpsilonLabs update site.


The source code of Epsilon is stored in the following Git repository.

Release tag

Additional projects which are experimental or not formally approved due to licensing constraints are available in Epsilon Labs.

Plain old JARs you can use to embed the latest stable version of Epsilon (1.1_SR1) as a library in your Java or Android application. You can also use Maven: see instructions below the table.

Binary Execution engines Workflow * EMF driver **

* To use the workflow tasks, you will need to install ANT.
** To use the EMF driver, you will also need EMF in your classpath (not contained in the JARs distributed here).

Since 1.4, these JARs are also available from Maven Central. For instance, to use the epsilon-core JAR from your pom.xml:


You can use the latest SNAPSHOTs at the Sonatype OSSRH repository. For instance, to use the 2.1 interim epsilon-core JAR from your pom.xml:


Ready-to-use Eclipse Kepler (4.3) distributions containing a stable version of Epsilon (v1.1_SR1) and all its mandatory and optional dependencies. You will only need a Java Runtime Environment.

Windows macOS Linux

Note for Windows users: Please make sure that you extract the downloaded distributions close to the root of a drive (e.g. C:) as the maximum path length on Windows may not exceed 255 characters by default.

Version 1.1_SR1 fixes the bugs and implements the enhancement requests below.

# Description Reporter
416920 Eugenia does not reload Ecore models
416918 Error markers created by Eugenia don't work well in Kepler
416907 Flock does not support pre and post blocks
416311 Enable EOL to access private/protected methods of Java objects
416345 Use default value for 'choose' and 'chooseMany' for the initial selection (JFace)
416828 org.eclipse.epsilon.emc.emf.virtual problem
Version Eclipse Released Notes
2.0 4.15 (2020-03) 30 May 2020 Major release
1.5.1 4.8 (Photon) 30 Sep 2018 Service release
1.5 4.8 (Photon) 12 Aug 2018 Scheduled release
1.4 4.6 (Neon) 6 Nov 2016 Scheduled release
1.3 4.5 (Mars) 8 Mar 2015 Scheduled release
1.2 4.4 (Luna) 25 Aug 2014 Scheduled release
1.1_SR1 4.3 (Kepler) 10 Sept 2013 Service release
1.1 4.3 (Kepler) 29 Aug 2013 Scheduled release
1.0 4.2 (Juno) 12 Nov 2012 Scheduled release