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This feature is experimental and requires --feature-flags=versions

Versioning allows you to deterministically control the precise revisions of dependencies used by your project from within your manifest file.

See our guide to getting started with versioning.

Version schemes


Versions in vcpkg come in four primary flavors:


A dot-separated sequence of numbers (


A date (2021-01-01.5)


A Semantic Version 2.0 (2.1.0-rc2)

See for a full specification.


An exact, incomparable version (Vista)

Port Versions

Each version additionally has a "port-version" which is a nonnegative integer. When rendered as text, the port version (if nonzero) is added as a suffix to the primary version text separated by a hash (#). Port-versions are sorted lexographically after the primary version text, for example:

1.0.0 < 1.0.0#1 < 1.0.1 < 1.0.1#5 < 2.0.0


Manifests can place three kinds of constraints upon the versions used:


The baseline references a commit within the vcpkg repository that establishes a minimum version on every dependency in the graph. If no other constraints are specified (directly or transitively), then the version from the baseline of the top level manifest will be used.

You can get the current commit of your vcpkg instance either by adding an empty "builtin-baseline" field, installing, and examining the error message or by running git rev-parse HEAD in the root of the vcpkg instance.

Baselines provide stability and ease of development for top-level manifest files. They are not considered from ports consumed as a dependency. If a minimum version constraint is required during transitive version resolution, the port should use version>=.


Within the "dependencies" field, each dependency can have a minimum constraint listed. These minimum constraints will be used when transitively depending upon this library. A minimum port-version can additionally be specified with a '#' suffix.

This constraint must refer to an existing, valid version (including port-version).


When used as the top-level manifest (such as when running vcpkg install in the directory), overrides allow a manifest to short-circuit dependency resolution and specify exactly the version to use. These can be used to handle version conflicts, such as with version-string dependencies.

Overrides are not considered from ports consumed as a dependency.

Example top-level manifest:

    "name": "example",
    "version": "1.0",
    "builtin-baseline": "a14a6bcb27287e3ec138dba1b948a0cdbc337a3a",
    "dependencies": [
        { "name": "zlib", "version>=": "1.2.11#8" },
    "overrides": [
        { "name": "rapidjson", "version": "2020-09-14" }

See also the manifest documentation for more syntax information.

Original Specification

See also the original specification