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Sage-on-Gentoo provides split ebuilds ( for the computer algebra system SAGE (


If you have problems with sage-on-gentoo or have suggestions talk to us on #gentoo-science on freenode

or write a mail to the "gentoo-science" mailing list

An archive listing past mails may be found at


  1. INSTALL AND CONFIGURE LAYMAN: The preferred way of getting sage-on-gentoo is layman. Make sure layman is installed with USE=git and correctly configured. You may find a guide for layman at:

  2. ADD OUR OVERLAY: Update your layman list and add this overlay with:

    layman -L
    layman -a sage-on-gentoo
  3. UNMASK EBUILDS: If you are using Gentoo/unstable or Funtoo (i.e. you have a line like ACCEPT_KEYWORDS=~arch in your /etc/make.conf) you may skip this step.

    Before being able to install you will need to unmask the required ebuilds. You should use the following file which already contains all required entries:


    For permanent unmasking place a symbolic link to that file into your /etc/portage/package.keywords/ directory:

    ln -s <path-to-layman>/sage-on-gentoo/package.keywords/sage \
  4. ADD USE-FLAGS FOR EBUILDS: Since Sage's ebuild requires its dependencies to be built with several USE- flags we provide a standard package.use file as well:

    ln -s <path-to-layman>/sage-on-gentoo/package.use/sage \

    If you are using unstable or Funtoo you may also need the following file:

    ln -s <path-to-layman>/sage-on-gentoo/package.use/sage-unstable \

    <path-to-layman> is usually /var/lib/layman (this path used to be /usr/local/portage/layman for older version of layman).


    emerge -va sage

    to install sage; please note that this will pull in a lot of dependencies. If you can not proceed with this step (because of circular dependencies, missing USE-flags, and so on) please report this behavior.

    NOTE also, that we do _not_ recommend to use the ATLAS (sci-libs/blas-alas and/or sci-libs/lapack-atlas) blas/lapack implementation since we experienced some failures with it:

    However, this should not pose a problem since the default choice is the reference implementation.

  6. UPDATE YOUR LOCAL OVERLAY: To update your local copy of sage-on-gentoo simply type:

    layman -S

    After that you may run

    emerge -vuDNa world

    or a similar command to check for updates.


A Prefix enables you to install Gentoo on different OS (e.g Linux, FreeBSD, MacOS, Solaris and even Windows). Thus, you may be able to run Sage on Gentoo e.g. on a Debian Linux. For a complete introduction into Gentoo Prefix and how to set it up visit

After having a working Prefix you may setup sage-on-gentoo in a Prefix by following the quick installation guide.

Currently, we support every Linux running with x86 or amd64 instruction sets, in particular the following architectures:

  • ~amd64-linux
  • ~x86-linux
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