[Nix-dev] unable to delete a store path

[Shea Levy]

On 09/26/2012 07:12 AM, Mathijs Kwik wrote:
> On Wed, Sep 26, 2012 at 12:36 PM, Shea Levy<shea at shealevy.com>  wrote:
>> On 09/26/2012 06:01 AM, Mathijs Kwik wrote:
>>> Hi all,
>>>
>>> I have a store path that seems to refer to itself only, but I can't delete
>>> it.
>>> How can I proceed?
>>>
>>>
>>> mathijs at bluebook nixos% nix-store --query --referrers-closure
>>> /nix/store/q6qapspkz2g4jlgnagiabrfvw32say9v-xine-lib-1.2.2
>>> /nix/store/q6qapspkz2g4jlgnagiabrfvw32say9v-xine-lib-1.2.2
>>>
>>> mathijs at bluebook nixos% nix-store --query --roots
>>> /nix/store/q6qapspkz2g4jlgnagiabrfvw32say9v-xine-lib-1.2.2
>>
>> There's your answer. You need to remove the gcroot (most likely something in
>> /nix/var/nix/gcroots or a subdirectory) pointing to this path before
>> deleting it.
> I think you mis-read my paste.
> "nix-store --query --roots /nix/store/..." is my input, it's all on
> the same line
> there is no output from the command itself

Ah, sorry. Can you check if the xine-lib path is in `nix-store --gc 
--print-live`, and also see if anything in `nix-store --gc 
--print-roots` might be the culprit? nix-store --query --roots should 
show it, but...

>>> mathijs at bluebook nixos% nix-store --delete
>>> /nix/store/q6qapspkz2g4jlgnagiabrfvw32say9v-xine-lib-1.2.2
>>> finding garbage collector roots...
>>> error: cannot delete path
>>> `/nix/store/q6qapspkz2g4jlgnagiabrfvw32say9v-xine-lib-1.2.2' since it
>>> is still alive
>>> 0 store paths deleted, 0.00 MiB freed
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>>