Runtime versions

When you specify a runtime in the runtime-versions section of your buildspec file, you can specify a specific version, a specific major version and the latest minor version, or the latest version. The following table lists the available runtimes and how to specify them. Not all runtime versions are available on all images. Runtime version selection is also not supported for the custom images. For more information, see Available runtimes. If you'd like to install and use a custom runtime version instead of the pre-installed runtime versions, see Custom runtime versions.

Ubuntu and Amazon Linux 2 platform runtime versions
Runtime name	Version	Specific version	Specific major and latest minor version	Latest version
android	28	android: 28	android: 28.x	android: latest
	29	android: 29	android: 29.x
dotnet	3.1	dotnet: 3.1	dotnet: 3.x	dotnet: latest
	5.0	dotnet: 5.0	dotnet: 5.x
	6.0	dotnet: 6.0	dotnet: 6.x
	8.0	dotnet: 8.0	dotnet: 8.x
golang	1.12	golang: 1.12	golang: 1.x	golang: latest
	1.13	golang: 1.13
	1.14	golang: 1.14
	1.15	golang: 1.15
	1.16	golang: 1.16
	1.18	golang: 1.18
	1.20	golang: 1.20
	1.21	golang: 1.21
	1.22	golang: 1.22
java	corretto8	java: corretto8	java: corretto8.x	java: latest
	corretto11	java: corretto11	java: corretto11.x
	corretto17	java: corretto17	java: corretto17.x
	corretto21	java: corretto21	java: corretto21.x
nodejs	10	nodejs: 10	nodejs: 10.x	nodejs: latest
	12	nodejs: 12	nodejs: 12.x
	14	nodejs: 14	nodejs: 14.x
	16	nodejs: 16	nodejs: 16.x
	18	nodejs: 18	nodejs: 18.x
	20	nodejs: 20	nodejs: 20.x
php	7.3	php: 7.3	php: 7.x	php: latest
	7.4	php: 7.4
	8.0	php: 8.0	php: 8.x
	8.1	php: 8.1
	8.2	php: 8.2
	8.3	php: 8.3
python	3.7	python: 3.7	python: 3.x	python: latest
	3.8	python: 3.8
	3.9	python: 3.9
	3.10	python: 3.10
	3.11	python: 3.11
	3.12	python: 3.12
ruby	2.6	ruby: 2.6	ruby: 2.x	ruby: latest
	2.7	ruby: 2.7
	3.1	ruby: 3.1	ruby: 3.x
	3.2	ruby: 3.2
	3.3	ruby: 3.3

You can use a build specification to install other components (for example, the AWS CLI, Apache Maven, Apache Ant, Mocha, RSpec, or similar) during the install build phase. For more information, see Buildspec example.

Custom runtime versions

Instead of using the pre-installed runtime versions in CodeBuild-managed images, you can install and use custom versions of your choice. The following table lists the available custom runtimes and how to specify them.

Note

Custom runtime version selection is only supported for Ubuntu and Amazon Linux images.

Custom runtime versions
Runtime name	Syntax	Example
dotnet	<major>.<minor>.<patch>	5.0.408
golang	<major>.<minor> <major>.<minor>.<patch>	1.19 1.19.1
java	corretto<major>	corretto15
nodejs	<major> <major>.<minor> <major>.<minor>.<patch>	14 14.21 14.21.3
php	<major>.<minor>.<patch>	8.0.30
python	<major> <major>.<minor> <major>.<minor>.<patch>	3 3.7 3.7.16
ruby	<major>.<minor>.<patch>	3.0.6

Custom runtime buildspec example

Here is an example of a buildspec that specifies custom runtime versions.

version: 0.2
phases:
  install:
    runtime-versions:
      java: corretto15
      php: 8.0.30
      ruby: 3.0.6
      golang: 1.19
      python: 3.7
      nodejs: 14
      dotnet: 5.0.408