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Pricing is based on actual usage, with charges varying according to how much you consume. Subscriptions have no end date and may be canceled any time.
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If you are an AWS Free Tier customer with a free plan, you are eligible to subscribe to this offer. You can use free credits to cover the cost of eligible AWS infrastructure. See AWS Free Tier for more details. If you created an AWS account before July 15th, 2025, and qualify for the Legacy AWS Free Tier, Amazon EC2 charges for Micro instances are free for up to 750 hours per month. See Legacy AWS Free Tier for more details.
You pay by the hour for the Base NixOS 23.05 machine image, billed per running EC2 instance. Each dimension maps to a specific EC2 instance type, so your rate depends on the instance size and family you launch. General-purpose, compute, memory, storage, accelerated, and high-memory instance families are all covered. Larger instances carry higher hourly rates than smaller ones in the same family. You are not locked into one size. You can pick the instance type that fits your workload and scale by changing types or running more instances.
Top-of-mind questions for buyers
What does one hourly unit map to for this machine image?
Each dimension maps to one running EC2 instance of that specific type. You pay the hourly rate for every hour the instance runs. The rate reflects that instance type's size and family. Running two instances of the same type bills two hourly rates.
Am I charged when the instance is stopped or powered off?
The hourly software rate applies only while the instance runs. Stopped instances do not accrue software charges. You may still pay underlying AWS fees for attached storage while the instance is stopped, but the software licence meters running time only.
What do I get with the image, and does the price depend on my workload?
You get a pre-configured NixOS machine image with optional XRDP and KDE Plasma desktop access and rollback to prior system states. The software runs on any listed instance type. Your rate depends only on the instance type you launch, not the workload you run.
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An AMI is a virtual image that provides the information required to launch an instance. Amazon EC2 (Elastic Compute Cloud) instances are virtual servers on which you can run your applications and workloads, offering varying combinations of CPU, memory, storage, and networking resources. You can launch as many instances from as many different AMIs as you need.
Version release notes
Up to date version of NixOS 23.05
Additional details
Usage instructions
Default user: ec2-user (use ecdsa and not rsa which is deprecated in almost all linux distributions)
To enable XRDP + KDE Plasma:
1/ In /etc/nixos/configuration.nix, uncomment /etc/nixos/xrdp.nix
2/ Rebuild the system: # nixos-rebuild switch (sometimes you need to launch it 2 times)
3/ Set a password on ec2-user
4/ Connect to the machine through RDP
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