pub upgrade creates symlinks to /root/.pub-cache/...

[DartBot]

<img src="https://avatars.githubusercontent.com/u/405837?v=3" align="left" width="96" height="96"hspace="10"> Issue by zoechi
Originally opened as dart-lang/sdk#23542

---

I activated a package globally for the user root yesterday,
now as normal user when I run pub upgrade symlinks in packages point to `/root/.pub-cache/hosted/...

[DartBot]

<img src="https://avatars.githubusercontent.com/u/405837?v=3" align="left" width="48" height="48"hspace="10"> Comment by zoechi

---

What does pub derive the .pub-cache directory location from?

[DartBot]

<img src="https://avatars.githubusercontent.com/u/405837?v=3" align="left" width="48" height="48"hspace="10"> Comment by zoechi

---

Added Invalid label.