--- title: vagrant-libvirt Dependency Hell « ipSpace.net blog description: A real-world account of dependency hell encountered with the vagrant-libvirt plugin and the fog-libvirt Ruby gem. A fog-libvirt 0.10.0 release broke the netlab... canonical: https://daily.dev/posts/vagrant-libvirt-dependency-hell-ipspace-net-blog-pxcu7owiq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: vagrant-libvirt Dependency Hell « ipSpace.net blog | daily.dev og:description: A real-world account of dependency hell encountered with the vagrant-libvirt plugin and the fog-libvirt Ruby gem. A fog-libvirt 0.10.0 release broke the netlab... og:url: https://daily.dev/posts/vagrant-libvirt-dependency-hell-ipspace-net-blog-pxcu7owiq og:image: https://api.daily.dev/og/posts/pxcu7OWIq.png og:image:alt: vagrant-libvirt Dependency Hell « ipSpace.net blog og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # vagrant-libvirt Dependency Hell « ipSpace.net blog **[ipSpace.net Blog](https://daily.dev/sources/ipspace)** · 4 min read · 0 upvotes · 0 comments ## Summary A real-world account of dependency hell encountered with the vagrant-libvirt plugin and the fog-libvirt Ruby gem. A fog-libvirt 0.10.0 release broke the netlab installation by changing a function's API, while the latest vagrant-libvirt 0.11.1 dropped support for e1000 network adapters needed by Cisco IOS and Nexus OS VMs. The workaround involved manually pinning vagrant-libvirt to version 0.4.1 and downgrading fog-libvirt to 0.9.0 using gem commands targeting Vagrant's non-standard gem directory. The fix was shipped in networklab PyPi package 1.4.1.post2. The vagrant-libvirt developer also quickly released 0.11.2 fixing the adapter bug, which netlab plans to adopt in its next release. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How do I fix vagrant-libvirt crashing when fog-libvirt 0.10.0 is installed? Downgrade fog-libvirt to 0.9.0 using gem commands targeting Vagrant's internal gem directory. First install vagrant-libvirt 0.4.1, then run: GEMS_DIR=`echo ~/.vagrant.d/gems/*`; GEM_HOME=$GEMS_DIR gem uninstall -aIx fog-libvirt; GEM_HOME=$GEMS_DIR gem install 'fog-libvirt:0.9.0'. The fog-libvirt 0.10.0 release changed a function's API, breaking all released vagrant-libvirt versions that support the e1000 adapter. _Engineers debugging Vagrant plugin breakage after a gem update track fixes like this on daily.dev._ ### Does vagrant-libvirt 0.11.1 support e1000 network adapters for Cisco IOS or Nexus OS VMs? No, vagrant-libvirt 0.11.1 only works with virtio network adapters. Cisco IOS and Nexus OS VMs require the emulated e1000 (Intel Ethernet) adapter, making 0.11.1 a showstopper for those platforms. The bug was fixed in vagrant-libvirt 0.11.2, released shortly after the issue was reported. _Teams running Cisco VM labs with Vagrant can follow vagrant-libvirt release coverage on daily.dev._ ## Similar posts on daily.dev - [libvirt provider « ipSpace.net blog](https://daily.dev/posts/libvirt-provider-ipspace-net-blog-jtcrzcqxc) · ipSpace.net Blog · 1 upvotes · 0 comments - [On Ditching Vagrant](https://daily.dev/posts/on-ditching-vagrant-j0ekatxsa) · Lobsters · 1 upvotes · 0 comments - [How vagrant-libvirt Plugin Deals with Duplicate Subnets « ipSpace.net blog](https://daily.dev/posts/how-vagrant-libvirt-plugin-deals-with-duplicate-subnets-ipspace-net-blog-vc0hfbcl3) · ipSpace.net Blog · 2 upvotes · 1 comments - [netlab 26.09: Syslog, More DNS, Netmiko « ipSpace.net blog](https://daily.dev/posts/netlab-26-09-syslog-more-dns-netmiko-ipspace-net-blog-7hzbp4smq) · ipSpace.net Blog · 0 upvotes · 0 comments - [Networking Aspects of Running VMs in Containers « ipSpace.net blog](https://daily.dev/posts/networking-aspects-of-running-vms-in-containers-ipspace-net-blog-gttjndloc) · ipSpace.net Blog · 0 upvotes · 0 comments --- Tags: [#open-source](https://daily.dev/tags/open-source), [#devops](https://daily.dev/tags/devops), [#networking](https://daily.dev/tags/networking) [View this post on daily.dev](https://daily.dev/posts/vagrant-libvirt-dependency-hell-ipspace-net-blog-pxcu7owiq) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"vagrant-libvirt Dependency Hell « ipSpace.net blog","url":"https://daily.dev/posts/vagrant-libvirt-dependency-hell-ipspace-net-blog-pxcu7owiq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/vagrant-libvirt-dependency-hell-ipspace-net-blog-pxcu7owiq"},"datePublished":"2026-08-11T08:53:28.932Z","dateModified":"2026-08-24T06:55:57.449Z","description":"A real-world account of dependency hell encountered with the vagrant-libvirt plugin and the fog-libvirt Ruby gem. 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First install vagrant-libvirt 0.4.1, then run: GEMS_DIR=`echo ~/.vagrant.d/gems/*`; GEM_HOME=$GEMS_DIR gem uninstall -aIx fog-libvirt; GEM_HOME=$GEMS_DIR gem install 'fog-libvirt:0.9.0'. The fog-libvirt 0.10.0 release changed a function's API, breaking all released vagrant-libvirt versions that support the e1000 adapter. Engineers debugging Vagrant plugin breakage after a gem update track fixes like this on daily.dev."}},{"@type":"Question","name":"Does vagrant-libvirt 0.11.1 support e1000 network adapters for Cisco IOS or Nexus OS VMs?","acceptedAnswer":{"@type":"Answer","text":"No, vagrant-libvirt 0.11.1 only works with virtio network adapters. Cisco IOS and Nexus OS VMs require the emulated e1000 (Intel Ethernet) adapter, making 0.11.1 a showstopper for those platforms. The bug was fixed in vagrant-libvirt 0.11.2, released shortly after the issue was reported. Teams running Cisco VM labs with Vagrant can follow vagrant-libvirt release coverage on daily.dev."}}]} ```