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for NixOS, where we might not know our PATH in advance.
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default -> default-94-link
default-82-link -> /nix/store/cc4480...
default-83-link -> /nix/store/caeec8...
...
default-94-link -> /nix/store/2896ca...
experimental -> experimental-2-link
experimental-1-link -> /nix/store/cc4480...
experimental-2-link -> /nix/store/a3148f...
* `--profile' / `-p' -> `--switch-profile' / `-S'
* `--link' / `-l' -> `--profile' / `-p'
* The default profile is stored in $prefix/var/nix/profiles.
$prefix/var/nix/links is gone. Profiles can be stored anywhere.
* The current profile is now referenced from ~/.nix-profile, not
~/.nix-userenv.
* The roots to the garbage collector now have extension `.gcroot', not
`.id'.
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the symlink ~/.nix-userenv to the given argument (which defaults to
.../links/current). /etc/profile.d/nix-profile creates this symlink
if it doesn't exist yet. Example use:
$ nix-env -l my_profile -i foo.nix subversion quake
$ nix-env -p my_profile
I don't like the term "profile". Let's deprecate it :-)
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dynamically links against libdb4 (?!), due to LD_LIBRARY_PATH it picks
up our libdb4 instead of SuSE's libdb4, but our libdb4 uses another
glibc so loading barfs.
Instead, all packages should use rpaths to store library locations in
executables/libraries. The disadvantage is that overriding rpaths is
harder. (It is possible by invoking the dynamic linker directly, e.g.,
`/lib/ld-linux.so.2 --ignore-path LIST program args...' to ignore the
rpath for the libraries in LIST). It would be better to use DT_RUNPATH,
which is consulted by the dynamic linker *after* LD_LIBRARY_PATH but
*before* ld.so.cache and the system directories.
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etc. correctly.
* Fixed nix-switch.
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