# Specifying dependency versions in my package

**URL:** <https://discourse.julialang.org/t/specifying-dependency-versions-in-my-package/31705>\
**Category:** General Usage\
**Tags:** package\
**Created:** [December 1, 2019, 12:21am UTC](https://discourse.julialang.org/t/specifying-dependency-versions-in-my-package/31705 "2019-12-01T00:21:02Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![mthelm85](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mthelm85/32/224164_2.png) [@mthelm85](https://discourse.julialang.org/u/mthelm85)\
**Post date:** [December 1, 2019, 12:21am UTC](https://discourse.julialang.org/t/specifying-dependency-versions-in-my-package/31705/1 "2019-12-01T00:21:02Z")

</div>

So I wrote my first package (CurrentPopulationSurvey.jl) and it was just added to the registry. When I went to download it via `add CurrentPopulationSurvey` I got the following error:

```julia
(v1.2) pkg> add CurrentPopulationSurvey
  Updating registry at `C:\Users\mthel\.julia\registries\General`
  Updating git-repo `https://github.com/JuliaRegistries/General.git`
 Resolving package versions...
ERROR: Unsatisfiable requirements detected for package CurrentPopulationSurvey [d0231af6]:
 CurrentPopulationSurvey [d0231af6] log:
 ├─possible versions are: 0.1.0 or uninstalled
 ├─restricted to versions * by an explicit requirement, leaving only versions 0.1.0
 └─restricted by compatibility requirements with CSV [336ed68f] to versions: uninstalled — no versions left
   └─CSV [336ed68f] log:
     ├─possible versions are: [0.3.0-0.3.1, 0.4.0-0.4.3, 0.5.0-0.5.18] or uninstalled
     ├─restricted to versions * by Agents [46ada45e], leaving only versions [0.3.0-0.3.1, 0.4.0-0.4.3, 0.5.0-0.5.18]
     │ └─Agents [46ada45e] log:
     │ ├─possible versions are: 1.1.7 or uninstalled
     │ └─Agents [46ada45e] is fixed to version 1.1.7
     └─restricted to versions 0.5.12 by an explicit requirement, leaving only versions 0.5.12

```

I’m assuming I’ve screwed something up in the Project.toml. It currently looks like this:

```julia
name = "CurrentPopulationSurvey"
uuid = "d0231af6-78e7-4e9e-9602-dcd107aeccbe"
authors = ["Matt Helm"]
version = "0.1.0"

[deps]
CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"
DataDeps = "124859b0-ceae-595e-8997-d05f6a7a8dfe"
DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
Glob = "c27321d9-0574-5035-807b-f59d2c89b15c"
JuliaDB = "a93385a2-3734-596a-9a66-3cfbb77141e6"

[compat]
julia = "1.2"
CSV = "0.5.18"
DataDeps = "0.7.1"
DataFrames = "0.19.4"
Glob = "1.2.0"
JuliaDB = "0.13.0"

[extras]
Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"

[targets]
test = ["Test"]

```

Is this error being caused by the specification of versions in `[compat]` or is something else wrong?

---

<div class="post-metadata">

**Author:** ![00vareladavid](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/00vareladavid/32/23521_2.png) [@00vareladavid](https://discourse.julialang.org/u/00vareladavid)\
**Post date:** [December 1, 2019, 1:44am UTC](https://discourse.julialang.org/t/specifying-dependency-versions-in-my-package/31705/2 "2019-12-01T01:44:53Z")

</div>

`CSV = "0.5.18"` means that `CSV` has to be in `[0.5.18,0.6.0)`. But the version of `CSV` in your current project seems to be `0.5.12`, which is not in that range, so the resolver fails. You can force CSV to the correct version with:

```julia
pkg> add CurrentPopulationSurvey CSV@0.5.18

```

Note that the behavior of the resolver has been adjusted so that manual interventions like this will not be necessary in the future (starting with Julia 1.4):

```julia
(ExampleProject) pkg> status
Status `/tmp/ExampleProject/Project.toml`
  [336ed68f] CSV v0.5.12

(ExampleProject) pkg> add CurrentPopulationSurvey
 Resolving package versions...
  Updating `/tmp/ExampleProject/Project.toml`
  [336ed68f] ↑ CSV v0.5.12 ⇒ v0.5.18
  [d0231af6] + CurrentPopulationSurvey v0.1.0

```

---

<div class="post-metadata">

**Author:** ![mthelm85](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mthelm85/32/224164_2.png) [@mthelm85](https://discourse.julialang.org/u/mthelm85)\
**Post date:** [December 1, 2019, 4:18pm UTC](https://discourse.julialang.org/t/specifying-dependency-versions-in-my-package/31705/3 "2019-12-01T16:18:55Z")

</div>

Thanks for the info! I tried to install as you suggested and got this:

```julia
(v1.2) pkg> add CurrentPopulationSurvey CSV@0.5.18
 Resolving package versions...
ERROR: Unsatisfiable requirements detected for package DataFrames [a93c6f00]:
 DataFrames [a93c6f00] log:
 ├─possible versions are: [0.11.7, 0.12.0, 0.13.0-0.13.1, 0.14.0-0.14.1, 0.15.0-0.15.2, 0.16.0, 0.17.0-0.17.1, 0.18.0-0.18.4, 0.19.0-0.19.4] or uninstalled
 ├─restricted to versions * by Agents [46ada45e], leaving only versions [0.11.7, 0.12.0, 0.13.0-0.13.1, 0.14.0-0.14.1, 0.15.0-0.15.2, 0.16.0, 0.17.0-0.17.1, 0.18.0-0.18.4, 0.19.0-0.19.4]
 │ └─Agents [46ada45e] log:
 │ ├─possible versions are: 1.1.7 or uninstalled
 │ └─Agents [46ada45e] is fixed to version 1.1.7
 ├─restricted to versions 0.19.3 by an explicit requirement, leaving only versions 0.19.3
 └─restricted by compatibility requirements with CurrentPopulationSurvey [d0231af6] to versions: 0.19.4 — no versions left
   └─CurrentPopulationSurvey [d0231af6] log:
     ├─possible versions are: 0.1.0 or uninstalled
     └─restricted to versions * by an explicit requirement, leaving only versions 0.1.0

```

I’m trying to figure out if this is a consequence of how I’ve specified the `[compat]` section of my Project.toml in my package CurrentPopulationSurvey, or if this is a consequence of not setting up isolated project environments for all of my different Julia projects…?