# How do I enable / install moc? **URL:** \ **Category:** Language Support\ **Created:** [January 16, 2023, 7:29pm UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005 "2023-01-16T19:29:12Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![blabagastered](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/blabagastered/32/8592_2.png) [@blabagastered](https://forum.dfinity.org/u/blabagastered)\ **Post date:** [January 16, 2023, 7:29pm UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005/1 "2023-01-16T19:29:12Z")
On `dfx deploy icrc_token` I’m getting: > [@icrc1/src/ICRC1/lib.mo:16.1-16.40: import error \[M0010\], package "StableTrieMap" not defined](https://forum.dfinity.org/t/icrc1-src-icrc1-lib-mo-16-1-16-40-import-error-m0010-package-stabletriemap-not-defined/18004/1): > > `Failed to run 'moc'.` How do I install it / add it / make it runnable? ---
**Author:** ![blabagastered](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/blabagastered/32/8592_2.png) [@blabagastered](https://forum.dfinity.org/u/blabagastered)\ **Post date:** [January 17, 2023, 5:00am UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005/2 "2023-01-17T05:00:15Z")
The problem was that `mops install` needs to be run, I had gotten two repos mixed up. It’s not listed as part of the instructions in the mops documentation [Internet Computer Content Validation Bootstrap](https://j4mwm-bqaaa-aaaam-qajbq-cai.ic0.app/docs/install) ---
**Author:** ![Gekctek](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/gekctek/32/6863_2.png) [@Gekctek](https://forum.dfinity.org/u/Gekctek)\ **Post date:** [January 17, 2023, 5:15am UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005/3 "2023-01-17T05:15:08Z")
@ZenVoich ^ Maybe add a line in there about `mops install` @blabagastered My guess is the `mops add <..>` installs them, vs just modifying the config file and doing `mops install` ---
**Author:** ![blabagastered](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/blabagastered/32/8592_2.png) [@blabagastered](https://forum.dfinity.org/u/blabagastered)\ **Post date:** [January 17, 2023, 5:22am UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005/4 "2023-01-17T05:22:32Z")
`mops add ` seems a bit odd to me because if you need 10 packages that means running 10 commands, which seems off. Perhaps stating on docs there are two ways: adding dependencies to mops.toml + running `mops install`, or running `mops add ` for each package individually (if that is indeed correct). Generally, for cloned repos, `mops install` will make more sense. ---
**Author:** ![ZenVoich](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/zenvoich/32/5969_2.png) [@ZenVoich](https://forum.dfinity.org/u/ZenVoich)\ **Post date:** [January 17, 2023, 5:56am UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005/5 "2023-01-17T05:56:03Z")
@blabagastered @Gekctek I will add information about `mops install` to the documentation ---
**Author:** ![blabagastered](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/blabagastered/32/8592_2.png) [@blabagastered](https://forum.dfinity.org/u/blabagastered)\ **Post date:** [January 17, 2023, 6:04am UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005/6 "2023-01-17T06:04:07Z")
Great. @ZenVoich,maybe a 4.A and a 4.B sections (mops add, mops install), with a brief “you can do either this or that” sort of thing. I’d also suggest changing this line > `import Lib "mo:";` for these two: > `import PackageName "mo:";` > for example, `import Itertools "mo:itertools/Iter";` To avoid ambiguity and to stay consistent in the “packages” language (as opposed to “library”) found in the rest of the documentation. ---
**Author:** ![blabagastered](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/blabagastered/32/8592_2.png) [@blabagastered](https://forum.dfinity.org/u/blabagastered)\ **Post date:** [January 18, 2023, 3:24pm UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005/7 "2023-01-18T15:24:12Z")
Hey, how can I install this repo ([GitHub - ZhenyaUsenko/motoko-hash-map: Stable hash maps for Motoko](https://github.com/ZhenyaUsenko/motoko-hash-map) ) into a project so that I can use it via `import Map "mo:hashmap/Map";` ? Tried `mops add hashmap` but no luck. ---
**Author:** ![ZenVoich](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/zenvoich/32/5969_2.png) [@ZenVoich](https://forum.dfinity.org/u/ZenVoich)\ **Post date:** [January 19, 2023, 5:13am UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005/8 "2023-01-19T05:13:23Z")
> [@blabagastered](#): > > Tried `mops add hashmap` but no luck. This only works for packages published to mops. Try this to install from github: ```auto mops add https://github.com/ZhenyaUsenko/motoko-hash-map#v7.0.0 ``` and import like this ```motoko import Map "mo:motoko-hash-map/Map"; ``` Also you can rename `motoko-hash-map` to `hashmap` in mops.toml to be able to import like this ```motoko import Map "mo:hashmap/Map"; ``` If you rename package in `mops.toml` you need to run `mops install` to install the package with new name. ---
**Author:** ![blabagastered](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/blabagastered/32/8592_2.png) [@blabagastered](https://forum.dfinity.org/u/blabagastered)\ **Post date:** [January 19, 2023, 10:46am UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005/9 "2023-01-19T10:46:26Z")
Thank you. I only realised now this is meant to be a vessel package. I’ve not used vessel. Only mops. Is it ok to use both vessel and mops together in the same project / repo, or might it cause issues? ---
**Author:** ![ZenVoich](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/zenvoich/32/5969_2.png) [@ZenVoich](https://forum.dfinity.org/u/ZenVoich)\ **Post date:** [January 19, 2023, 11:08am UTC](https://forum.dfinity.org/t/how-do-i-enable-install-moc/18005/10 "2023-01-19T11:08:48Z")
> [@blabagastered](#): > > Is it ok to use both vessel and mops together in the same project / repo, or might it cause issues? You can use only one of these when you build canisters (which is listed in `packtool` in `dfx.json`)