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3rd chunk of `doc/manual/source/release-notes/rl-0.10.md`
6062aea4f07f502d1b3f517c7fd1e2d466782c156f2d9896000000010000082f
            value` can be used to specify function arguments on the command
    line.

  - `nix-install-package --url
            URL` allows a package to be installed directly from the given URL.

  - Nix now works behind an HTTP proxy server; just set the standard
    environment variables `http_proxy`, `https_proxy`, `ftp_proxy` or
    `all_proxy` appropriately. Functions such as `fetchurl` in Nixpkgs
    also respect these variables.

  - `nix-build -o
            symlink` allows the symlink to the build result to be named
    something other than `result`.

  - Platform support:
    
      - Support for 64-bit platforms, provided a [suitably patched ATerm
        library](http://bugzilla.sen.cwi.nl:8080/show_bug.cgi?id=606) is
        used. Also, files larger than 2 GiB are now supported.
    
      - Added support for Cygwin (Windows, `i686-cygwin`), Mac OS X on
        Intel (`i686-darwin`) and Linux on PowerPC (`powerpc-linux`).
    
      - Users of SMP and multicore machines will appreciate that the
        number of builds to be performed in parallel can now be
        specified in the configuration file in the `build-max-jobs`
        setting.

  - Garbage collector improvements:
    
      - Open files (such as running programs) are now used as roots of
        the garbage collector. This prevents programs that have been
        uninstalled from being garbage collected while they are still
        running. The script that detects these additional runtime roots
        (`find-runtime-roots.pl`) is inherently system-specific, but it
        should work on Linux and on all platforms that have the `lsof`
        utility.
    
      - `nix-store --gc` (a.k.a. `nix-collect-garbage`) prints out the
        number of bytes freed on standard output. `nix-store
                                                        --gc --print-dead` shows how many bytes would be freed by an
        actual garbage collection.
    
      - `nix-collect-garbage -d` removes all old generations of *all*
        profiles before calling the actual garbage collector (`nix-store
Title: Nix Release 0.10: Continued Improvements - Platform Support, Garbage Collection, and Parallel Builds
Summary
This section of the Nix Release 0.10 notes details improvements to platform support, garbage collection, and build processes. It covers specifying function arguments via the command line, installing packages directly from URLs, and enabling Nix to work behind HTTP proxies. The release introduces support for 64-bit platforms, Cygwin, Mac OS X on Intel, and Linux on PowerPC. Users with SMP and multicore machines can now configure the number of parallel builds. Garbage collection improvements prevent running programs from being prematurely collected and provide more detailed output on freed space and dead bytes. Additionally, `nix-collect-garbage -d` removes all old profile generations before garbage collection.