# GRC - specifying version for install

**URL:** <https://www.ruby-forum.com/t/grc-specifying-version-for-install/233399>\
**Category:** GNU Radio\
**Created:** [December 10, 2014, 2:52pm UTC](https://www.ruby-forum.com/t/grc-specifying-version-for-install/233399 "2014-12-10T14:52:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [December 10, 2014, 2:52pm UTC](https://www.ruby-forum.com/t/grc-specifying-version-for-install/233399/1 "2014-12-10T14:52:07Z")

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Hi, I have only used pybombs to install GRC and it is a fantasic way to  
get this done. Thanks very much for pybombs! I do notice though that  
there is no mention of which version will be installed. For example I  
have  
two machines GRC installed within about a week of one another a couple  
of  
months ago. One machine has 3.7.5 git-0-grbb2b314 while the other has  
3.7.6 git-1-g01deede3. This past weekend I installed it on a third  
machine  
which reports as 3.7.2.1 All of these machines are to be used within a  
sensor network and I am weery of having differing versions. Should I be  
concerned? Is there an easy way to update them to have the same  
version?  
Will I need to wipe everything and start fresh on each machine?

Thanks as always  
John

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**Author:** ![jmaenpaa](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9de053/32.png) [@jmaenpaa](https://www.ruby-forum.com/u/jmaenpaa)\
**Post date:** [December 10, 2014, 8:33pm UTC](https://www.ruby-forum.com/t/grc-specifying-version-for-install/233399/2 "2014-12-10T20:33:11Z")

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> Hi, I have only used pybombs to install GRC and it is a fantasic way to get this  
> done. Thanks very much for pybombs! I do notice though that there is no mention  
> of which version will be installed. For example I have two machines GRC installed  
> within about a week of one another a couple of months ago. One machine has 3.7.5  
> git-0-grbb2b314 while the other has 3.7.6 git-1-g01deede3. This past weekend I  
> installed it on a third machine which reports as 3.7.2.1 All of these machines  
> are to be used within a sensor network and I am weery of having differing  
> versions. Should I be concerned? Is there an easy way to update them to have the  
> same version? Will I need to wipe everything and start fresh on each machine?

> Thanks as always  
> John

John,

I don’t know if there is a more straightforward way to do this, but  
here’s a way you can force a specific branch or tag, like “master”  
(default) or “v3.7.5.1” (latest release). Edit the file  
“pybombs/recipes/gnuradio.lwr” and change the value of “gitbranch”. You  
will need to rebuild by doing the following:

./pybombs clean uhd gnuradio  
./pybombs install uhd gnuradio

Sean