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MyGet 2017.1 Release Notes

As MyGet is a software-as-a-service leveraging a subscription model, we're transitioning our versioning scheme towards a format that is more understandable: YYYY.R. As such, these release notes comprise our first milestone of 2017, hence the version number 2017.1

The MyGet 2017.1 milestone was tagged on June 1st, 2017.


MyGet again adds some new functionality to the service. The following are the major highlights of this milestone.

We've built a MyGet Credential Provider for Visual Studio 2017! This extension allows you to authenticate against your MyGet feeds using OAuth. Install it from the Visual Studio Gallery!

Install the MyGet Credential Provider for Visual Studio 2017!

We added Maven support, and welcome Java/Android developers to the MyGet family! (Announcement | Docs)

Getting started with Maven on MyGet!

We've built a web utility to help you learn and adopt Semantic Versioning: check out our MyGet SemVer Explorer!

MyGet SemVer Explorer

We've partnered with to check for potential package vulnerabilities on your MyGet feeds! (Announcement | Docs)

Check for potential package vulnerabilities on your MyGet feeds!


MyGet (all plans)

The following applies to all MyGet plans:

  • NPM: added support for token authentication
  • NPM: added support for upstream token authentication, which now also supports Telerik's NPM registry as an upstream package source
  • NPM: added support for the fast search endpoint
  • NPM: added support for package deprecation
  • NPM: added support for package tagging
  • NPM: added support for dist-tag
  • NuGet: added support for NuGet's SemVer2 protocol, and added support for modifying build metadata on push upstream dialog
  • Maven: introduced support for Maven artifacts
  • Maven: introduced support for Android AAR artifacts
  • Symbols: added a toggle to support pushing symbols upstream as well
  • Symbols: when the upstream target feed is a MyGet feed, we automatically also push the symbols upstream
  • Usability: no longer show symbols packages separately on the Gallery's feed details view
  • Usability: minor modifications to the Gallery feed details UI to improve the user experience
  • Usability: added a download all button to the packages dropdown in build results view
  • Usability: hide pre-authenticated feed endpoints from Feed Details view when the feed is not a private feed
  • Usability: added a copy-to-clipboard button to the connection details popup on Gallery feeds
  • Security: we've built a MyGet Credential Provider for Visual Studio 2017! This extension allows you to authenticate against your MyGet feeds using OAuth.
  • Security: we've consolidated the login page: one page to rule them all!
  • Security: we no longer display access tokens (you can still copy them though)
  • Security: improved auditing
  • Security: added support for feed and privilege scopes to access tokens / api keys (in addition to expiration support which we already had)
  • Integrations: integration has been retired in favor of MyGet's own Symbols functionality
  • Integrations: added integration to detect package vulnerabilities and report them on your feed details view

MyGet Enterprise

The enterprise plan has all functionality from the paid subscription plans, and more! The following applies only to the MyGet Enterprise plan:

  • Usability: the Gallery index is now the default landing page when authenticated on MyGet Enterprise
  • Security: added support for marking users as external to the tenant. This prevents the external user from accessing Enterprise feeds, unless privileges are explicitly assigned at the feed level. (see Feed Types)

MyGet Build Services

  • Added support for Visual Studio 2017.NET Core and the new PackageReference project format (Announcement)
  • AssemblyInfo patching now supports globbing patterns (like **\**.cs)

Bug Fixes & Other Improvements

  • MyGet has been upgraded to run on .NET Framework 4.6.2, which seemed to have positive effect on performance
  • Overwriting source symbols is now blocked when forbid overwrite is enabled on the feed
  • Fixed a bug in semantic version range parsing of npm dependencies (tilde and carret ranges)
  • Show quota per feed on user profile page (helps answer the question: 'which of my feeds consumes most?')
  • Fixed an issue caused by breaking changes in VSTS API (repository remoteUrl returned by VSTS API no longer contained VSTS collection name)
  • Fixed an issue in the Gallery index view related to feed icons
  • Fixed an issue that caused an HTTP 500 when a nuspec contained some invalid data
  • Fixed an issue that caused NPM push upstream to fail when no package description was given
  • Fixed an issue with the symbols code browser when a file was not found or could not be displayed
  • NuGet: allow packages.config files to be uploaded without version number specified

Please tell us how we're doing by taking 10 seconds of your time to answer a single question (and optionally provide any feedback you want). We love hearing from you, so keep that feedback coming! MyGet is built for you!

Happy packaging!

Host your packages on MyGet!

Working with MyGet upstream sources

Upstream sources play a key role in a professional approach towards Package Management. MyGet gives you the option to specify one or more upstream sources for a package feed. Even though this feature has been available on MyGet for years now, we feel it upstream sources deserve a place in the spotlight once: they enable various scenarios that are impossible on any other package management service, and above all: they are a huge facilitator for a smooth and automated development workflow (and thus developer happiness :-)).

In this post:

  • Why upstream sources?
  • Supported upstream sources

Why use upstream sources?

In bullet-form:

  • Upstream sources make it very easy to pull in packages from other package sources onto your downstream MyGet feeds.
  • You can also target these upstream sources to push packages upstream from your MyGet feeds.
  • Any configured upstream source on your MyGet feed will be made available to you in MyGet Build Services, without having to commit any secrets such as credentials or API keys in your source repository. If you're using NuGet: no need to create a nuget.config file!

If you are confused about the usage of "upstream" and "downstream" in the context of package sources, we've got a little poetic explanation for you, which may already help you visualize the relationship between package consumers, your MyGet feeds, and your feed's upstream sources.

Consider the direction in which packages are flowing from a given package source to an ocean of consumers.Your package may have dependencies "upstream", to packages on another feed. From the point of view of those dependencies, the depending package is located "downstream". When a user consumes the downstream package, it will also fetch the upstream dependencies.The consumer, however, is only allowed to fetch or query those upstream packages if the feed being queried (downstream) is also configured to proxy (or mirror) the upstream package source.

Supported upstream sources

By default, MyGet feeds have the public, central repositories configured for each package type. This includes:

  • NuGet:
  • Bower:
  • npm:
  • Maven:

To configure an additional upstream source for your MyGet feed, navigate to Feed Settings > Upstream Sources. Then click Add Upstream Source and select the package source type you want to add.

A dialog will prompt your for upstream source information and will also expose a few common presets for you to take advantage of. Did you know we even support Dropbox?!

Upstream Source Credentials

If you have any access privileges to other MyGet feeds, you will see those in the MyGet Feeds presets, so you can easily build a chain of package sources to facilitate a package promotion flow.

If you select a private MyGet feed you have access to as an upstream source, there's no need to provide credentials to be able to restore packages from it on MyGet Build Services. MyGet will impersonate your user account when authenticating against that upstream source.

For any non-MyGet upstream source that requires authentication to pull packages, you'll have to provide username and password to be used during Basic Authentication.

Warning! Be very careful with password managers and browser add-ons providing auto-completion of credentials!
We recommend disabling these credential managers on the MyGet web site to avoid issues when editing upstream sources. Oftentimes, these tools auto-complete the credentials fields with out-dated credentials (even when editing different settings in the dialog). 
When running into package restore failures on MyGet Build Services, or when noticing that upstream packages are no longer available downstream, this is the most common source of the issue.

In the opposite direction, in order to push packages from your downstream MyGet feed to the upstream source, you may need to configure a (scoped) API key or access token.

Package Source Filtering

Applies to: NuGet (v2 only!)

When the upstream source is a v2 NuGet feed, you may configure additional OData filtering. Filtering is based on the OData v3 Filtering System. Valid filters are similar to Id eq 'jQuery' or IsLatestVersion eq true and Id ne 'Foo'.

Warning! This capability may go away at some point in favor of newer NuGet v3 APIs.
We currently still keep the feature around for some scenarios that are not yet fully supported on NuGet v3.

Adding a package from an upstream source

You can easily add packages to your MyGet feed originating from an upstream source, such as,, etc. This is using the feed's configured upstream sources under the hood. If you want to add a package from another feed onto your MyGet feed, the other feed needs to be configured as an upstream source to that feed.

Adding a package from an upstream source can happen in three ways: manually, by reference (proxying), or by value (mirroring).

  • Manually: you can add packages from an upstream source to your feed manually by using the Add Package button you will find under your feed's Packages page.

Select From Feed in the dialog that prompts.

  • Proxying: the package metadata is copied to the MyGet feed, the package itself remains hosted on the upstream source. When querying the package, we call the upstream source to fetch the package.
  • Mirroring: the package metadata and the package itself are copied onto the MyGet feed. When querying the package, we server the package directly and don't use the upstream source. Mirroring of a package version happens upon the first request for that given package version.

Configuring upstream sources on your MyGet feed unlocks quite a few integration scenarios and automation opportunities!

Proxy packages from an upstream source

You can configure an upstream source to proxy upstream packages through your MyGet feed to your feed consumers. Proxying makes it easy to have a single MyGet feed aggregate packages from multiple sources. Package consumers need only to configure a single MyGet feed, and all packages available on upstream, proxied package sources will become available to them.


  • upstream packages do not count against your MyGet storage quota
  • authentication against upstream, private MyGet sources happens automatically (see Upstream Source Credentials)
  • especially for NuGet: no longer subject to chatty clients reaching out to all configured feeds during dependency resolution (MyGet can be smarter server-side)


  • every package request will incur additional latency as opposed to storing the package onto the MyGet feed

Warning! Avoid configuring multiple package source proxies on a single feed, or in a chain of feeds, as this will magnify the disadvantages, and result in very slow feed response times.

The following diagram illustrates the effects of upstream source proxying.

To enable upstream source proxying, you must tick the check-mark next to Make all upstream packages available in clients.

Mirror packages from an upstream source

You can configure an upstream source to mirror upstream packages onto your MyGet feed. This configuration is similar to package proxying, but takes it one step further.

Whenever someone requests a particular package from your MyGet feed for the first time, MyGet will query the upstream source and copy the package onto the MyGet feed.


  • No additional latency (except for the first hit that triggers the package mirroring)
  • Protected against upstream source availability issues
  • Protected against upstream package removal
  • Authentication against upstream, private MyGet feeds happens automatically (see Upstream Source Credentials)
  • Faster builds!


  • Mirrored packages count towards your MyGet storage quota (a classic storage versus speed trade-off, you can always upgrade your subscription or request a quote!)

The following diagram illustrates the effects of upstream source mirroring.

To enable upstream source mirroring, you must tick the check-mark next to Automatically add downloaded upstream packages to the current feed (mirror).

Optionally, you can also tick the third check-mark to indicate that any package found upstream is to be considered a package dependency (and should not be consumed directly). This will hide those packages from search results, whilst still allowing you to restore them.

Once upstream source mirroring is enabled, we can consume our MyGet feed from Visual Studio which will also list upstream packages. For example, the example acmecompany feed only lists one package:

One package on our feed

When searching in Visual Studio, we do see packages that originate from upstream sources:

Visual Studio showing upstream packages

After installing this package, our feed now automatically contains a copy of the jQuery package:

Mirror upstream pckages

From now on, the package is available from our MyGet feed directly, without having to explicitly add it manually from the upstream source.

Using a MyGet feed as a staging area (before pushing upstream)

Many development teams are using some kind of package promotion workflow: pushing a package from one feed to another based on quality gates, target audience, or any other criteria. This is very typical scenario for which upstream sources are essential.

Of course, all of this can happen in an automated fashion using package manager client. However, as promoting a package typically involves some kind of human intervention (e.g. release manager approval), we've also made it a first-class feature in the MyGet web site.

Simply pick the package version you want to promote from the package details page, and hit the Push button to initiate the package promotion flow.

A dialog will provide you with additional options. MyGet is also smart enough to detect any package dependencies you might want to push along in one go as part of this package promotion flow.

At this point, you can still make a few metadata changes before pushing upstream. This dialog allows you to:

  • modify or remove the prerelease label of the upstream package version. This allows you to e.g. drop the prerelease label to release a package without rebuilding/repackaging.
  • add release notes to be included in the package metadata. MyGet will even support release notes written in markdown and render them properly on the web site!
  • modify or remove the SemVer2 build metadata part of the upstream package version
  • exclude any detected dependencies or satellite packages from the push action
  • apply source labeling if the package was built using MyGet Build Services. When enabled, MyGet will find the build from which the package originated and will add a label to the source control revision it was built from.

To edit a package's metadata, simply click the Edit button next to it and make the modifications. To apply a given modification to all packages in the dialog, hit the rain drop button next to the editable field.

Using upstream sources on MyGet Build Services

Applies to: NuGet, npm

Upstream sources for a feed are also available during build. This can be useful in the following scenarios:

  • An additional upstream source is needed during build. MyGet will make the upstream source available during build if it has been added to the feed's upstream sources.
  • If you have a private feed requiring authentication but do not wish to add credentials to source control, credentials can be added to the feed's upstream source. These credentials will be available during build and allow you to consume a protected feed with ease.

Applies to: NuGet

  • The API key for an upstream source is also made available during the build process. This means during a build, you can call into nuget.exe push and push packages to configured upstream sources.
  • If you want to make use of nuget.exe push in a build script without having to specify the -Source parameter. This requires a default upstream source to be defined.

Applies to: npm
We strongly suggest to proxy to be able to run `npm install` during build, as npm will default to the MyGet feed as the default registry.

Setting default upstream sources to be used on MyGet Build Services

Applies to: NuGet

The NuGet.config file on our build agents is configured using NuGet's defaults, enriched with all NuGet upstream sources configured for your MyGet feed. Based on these defaults, the following conventions are active:

  • The default upstream source is set to (Aggregate Source), meaning all feeds will be queried for packages in the order defined in the feed's upstream sources.
  • The default push source (when using nuget push without the -Source parameter) is

Both of these conventions can be overridden by editing the build source configuration.

Auto updating packages

MyGet feeds can automatically fetch package updates made available through the upstream sources.

When adding or editing a upstream source, we can enable this behaviour per package source, as well as an interval when MyGet should check for updates.

Package Source Options

The following options are available:

  • E-mail me when package updates are available: Sends an e-mail to the specified recipient(s) when package updates are available on the upstream source.
  • Include prerelease versions: By default, MyGet will only consider stable packages. When enabled, we will also check pre-release packages from the upstream source.
  • Automatically update packages to their latest versions: Enables the behavior of automatically updating packages from the upstream source.
  • Update interval: Depending on your subscription plan, we can specify how often MyGet should check for updates (up to every 30 minutes on a Professional subscription)

As you can see, MyGet's support for upstream package sources unlocks a wide range of package management scenarios that may help you streamline your development flow and package governance even more. If you haven't tried the above scenarios yet, do give them a try and experience how it may make your life easier.

Oh, and we do support pushing your private symbols packages upstream along with your NuGet packages, too!

Happy Packaging!

PS: Please take 10 seconds of your precious time to tell us how we're doing

MyGet webhook for Microsoft Teams / Office 365 Groups

It's been possible for a while to let MyGet notify external services through webhooks whenever an event happens on our feeds, such as a package added/deleted. Today, we've added support for Microsoft Teams / Office 365 Groups. We can use it to have MyGet post events to a Microsoft Teams room or Office 365 group - increasing visibility of changes on the MyGet feed with members of our team.

How to configure?

To configure a MyGet webhook for Microsoft Teams / Office 365 Groups, head over to the team (or group) and configure a new Incoming Webhook connector. The name can be anything we want, and the icon, too. A nice square MyGet logo is available from our media repository. Once we save the webhook, we can copy its URL - we'll need this one on the MyGet side of things!

In MyGet, we can add a new Microsoft Teams webhook under the feed's Web hooks tab. All we need to do here is paste the URL we just copied from the Microsoft Teams / Office 365 side, pick the events we're interested in, and click Add.

From now on, when one of the selected events happen in MyGet, we will get notified of this.

Happy packaging!

Maven packages just arrived on MyGet

Let's go straight to the meat: we just shipped Maven support! If you're packaging .jar and .war (or Android .aar) and have a pom.xml to go with them, you can now add these to your MyGet feeds (or should we start calling them repositories).

Maven support is enabled on all MyGet accounts - starting today, you access to the Maven features described in our documentation.

Which features are available?

We currently support almost all features we have available for other package managers: uploading your own packages (via the web UI as well as via mvn or Gradle) and adding packages from upstream repositories like Maven Central. Packages can then be consumed in IntelliJ IDEA or Eclipse, using Maven or Gradle. It's possible to proxy upstream repositories into your MyGet feed. You can manage permissions and users, inspect package licenses and vulnerabilities, ...

A Maven repository on MyGet can also be used as a staging area: packages and snapshots can be published on MyGet, and once they are stable, pushed upstream to another repository out there - similar to what is possible for NuGet and NPM.

We're looking into supporting build services as well (theoretically you can already create a build.bat and invoke `mvn deploy` from it), but we'd love your feedback on what the perfect convention-based build for Maven/Gradle would look like.

Awesome! How do I get started?

Quite easy: head over to, sign in (or register) and create a feed. Our getting started documentation has some more details on how to upload your first Maven package to MyGet.

We're really excited about introducing Maven support on MyGet! You can now use MyGet to securely host and collaborate on NuGet, symbols and sources, Chocolatey, PowerShell, NPM, Bower, Maven and VSIX packages.

Happy packaging!

Configure which feed a token can push packages to - introducing feed-scoped access tokens

Many development teams are making use of a continuous integration server like TeamCity, Jenkins or VSTS to build their projects and push generated NuGet, npm, Bower and VSIX packages to their MyGet feed. When having multiple feeds, it is a good practice to limit the feeds this access token/API key can push packages to, ensuring the surface area of the specific access token is limited to just the feeds the access token requires access to.

In short, scoped access tokens:

  • Are a good security best-practice: use minimum required permissions for a specific operation
  • Avoid services/users accidentally pushing packages by using read-only tokens where possible
  • Allow pushing packages without the ability to get access to other packages on the feed (write-only)

New access tokens and existing access tokens can be scoped in terms of what they can do. We now let you to create read-only or write-only access tokens, optionally limiting write access to just one specific feed.

Create new access token scoped to a given feed

Next to scopes, the access token expiration date and time can also be specified, making it possible to create a time-limited access token that has to be recreated to continue having access to the feed.

Happy packaging!

Learning NuGet Semantic Version Ranges with SemVer Explorer

When authoring NuGet packages, you can declare package dependency versions using Semantic Versioning. NuGet allows specifying dependencies as floating ranges, using interval notation or using fixed version numbers, as explained in the NuGet docs.

MyGet SemVer Explorer allows you to specify a SemVer dependency range, and will check the target package repository for the package versions that match.

NuGet dependency range explorer

Version ranges can be simple (e.g. 6.1.* to match all packages >= 6.1.0) or more complex using interval notation (e.g. (8.0,9.0.1) to match versions that are between 8.0 and 9.0.1. SemVer explorer lets you try these ranges and see which versions of an actual package match. Once satisfied, version ranges can be used in a packages.config or project.json document for use with NuGet or the .NET Core command line.

Can I target MyGet feeds?

Definitely! By default, the tool is configured to query the v3 repository at You can simply change the target feed URL to the v3 NuGet feed of a MyGet repository you have access to, and we'll query that one instead.

Can I target private MyGet feeds?

If you have an access token that grants you read-access to the MyGet repository, you can leverage MyGet's support for pre-authenticated feed URLs. Make sure you target the pre-authenticated v3 NuGet endpoint. See our documentation for further guidance.

Have fun exploring the various semantic version constraints NuGet provides! And happy packaging!

Checking potential vulnerabilities in project dependencies

Software projects nowadays are based on many third party and open source libraries. It is important to be aware of any potential security vulnerabilities in these components, to ensure our own software project is secure. Thanks to OSSIndex and Vor Security, we now have a vulnerability report ready for your MyGet feed!

While still in preview, every feed now has a Vulnerabilities tab which reports potential vulnerabilities in packages on that feed, whether NuGet, npm or Bower.


The vulnerability report provides us with an overview of potential vulnerabilities in our dependencies. We can also see the percentage of packages with potential vulnerabilities versus the percentage of packages with no known vulnerabilities.

Give it a go, we’re looking forward to your feedback on this new feature! Leave your comments below or reach out on Twitter.

Happy packaging!

Building NuGet and npm using Atlassian Bitbucket Pipelines

Bitbucket Pipelines is a new continuous integration service (still in beta) from Atlassian, built into Bitbucket. Let’s have a look at how we can use Bitbucket pipelines to build, package and publish a .NET Core library to MyGet so we can consume it in our own projects.

How does Bitbucket pipelines work?

To configure a build on Bitbucket, we’ll need a bitbucket_pipelines.yml file which describes the steps to execute as part of the pipeline. Whenever a commit is made to our source repository on Bitbucket, whether git or Mercurial based, a Docker image is started in which our pipeline will be executed.

Here’s a full write-up on how a .NET Core build would work.

How to package and publish a NuGet package to MyGet?

First of all, we’ll need a bitbucket_pipelines.yml file which loads a .NET Core-enabled Docker image. The pipeline itself will have to run package restore, compile the source code, optionally run tests, then package the library and publish it to our MyGet feed.

We have created a sample library at, from which the bitbucket_pipelines.yml file can be copied into your own project. A few environment variables need to be configured for the pipeline (see the header of the bitbucket_pipelines.yml file) to make sure it can publish to our MyGet feed.

Once the pipeline completes, we can look at the build output and find the resulting NuGet package on our MyGet feed. The full build output is available as well.


How to package and publish an npm package to MyGet?

First of all, we’ll need a bitbucket_pipelines.yml file which loads a Docker image which has node and npm installed. The pipeline itself will have to run npm install, optionally run tests, then package the library and publish it to our MyGet feed.

We have created a sample library at, from which the bitbucket_pipelines.yml file can be copied into your own project. The header of this file lists a few environment variables that have to be configured for the Bitbucket pipeline. When run completes, we can consult the build output:

Publishing npm from BitBucket

Happy packaging!

Keeping feeds clean with retention rules

MyGet Package Retention Rules help clean up your NuGet npm feedMany developer teams use MyGet for storing their continuous integration and/or nightly builds of NuGet, npm, Bower and VSIX packages. As more and more packages get added, it may become harder to manage them all. Some packages may be used in projects, while others are not. Let’s go over the options available for housekeeping.

By default, MyGet keeps all package versions available on our feeds. Every package pushed is there forever, unless manually removed or removed by package retention. By setting retention rules, it is possible to automatically trim the list of packages to X latest packages, keeping into account package usage in projects and package dependency trees.

Configuring retention rules

Retention rules are defined per feed. Some feeds may have more aggressive retention rules defined, other may not have them enabled at all. From the Retention Rules, we can define:

  • the maximum number of stable versions to keep
  • the maximum number of prerelease versions to keep
  • whether to keep depended packages or not – enabling this makes sure package restores always complete successfully by keeping the dependency tree in its entirety
  • whether to allow removal of packages that have downloads – enabling this option ensures that packages that are being used in projects never get deleted

Setting retention rules

Keeping a specific package around

Retention rules are quite brute-force: they will always remove all packages that match the configured rules. Luckily, MyGet lets us “pin” packages which we want to keep around. For example, we may want to only keep the latest 10 pre-release versions while still keeping around the 20th pre-release version we’re still using in our projects.

From the package details page, we can define which package versions should never be considered by retention rules by using the Pin button next to the package.

Pinning packages so they do not get removed

We can pin package per version, or all versions at once using the button at the top of the Package History list. Of course, we can also Unpin packages using the same approach. Once a package is unpinned, retention rules are allowed to remove them.

Custom retention rules using web hooks

Using the built-in retention rules may not be enough. For example, what if we want to run retention rules based on other conditions than the latest version? What if we want to only remove packages when there is a full moon? Using web hooks, we can subscribe to certain feed events (like “package added”) and run our custom logic to optionally remove packages from our feed. We have a complete example available that helps getting started with web hooks.

Learn more about package retention in our documentation.

Happy packaging!

Improved build log viewer with error navigation

We have just deployed a newer version of our build log viewer. When using MyGet’s build services to compile and package NuGet, npm or VSIX packages, the build log viewer now has colored output as well as line numbers that have hyperlinks. Want to share a certain line in the build log with a colleague? Click the line number and send the link so they can open the build log right where you left.

By making less important build output less prominent and by highlighting more important messages, reading and analyzing the build log becomes much easier: less important messages have a gray color tone, normal messages are white. Warnings and errors are highlighted in yellow and red, making them much easier to spot.

Build log with colored output

When warnings or errors are found in a build log, MyGet now shows additional navigation buttons at the top. Next to the number of warnings or errors, the up and down arrows can be clicked to jump to the next important message in your build log.

Warning and error navigation

We’re looking forward to hearing your thoughts on this improvement. Let us know through the comments below or drop us a note via e-mail or Twitter.

Happy packaging!