* Release notes.
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Eelco Dolstra
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<title>Nix Release Notes</title>
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<!--==================================================================-->
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<section><title>Release 0.10 (TBA)</title>
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<note><para>This version of Nix uses Berkeley DB 4.4 instead of 4.3.
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@ -23,19 +26,45 @@ irreversible.</para></warning>
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<itemizedlist>
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<listitem><para>An option <option>--compare-versions</option> (or
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<option>-c</option>) has been added to <command>nix-env
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--query</command> to allow you to compare installed versions of
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packages to available versions, or vice versa. An easy way to see
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if you are up to date with what’s in the channel is <literal>nix-env
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-qc \*</literal>.</para></listitem>
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<listitem><para><literal>nix-env --query</literal> now takes as
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arguments a list of package names about which to show information,
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just like <option>--install</option>, etc.: for example,
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<literal>nix-env -q gcc</literal>. Note that to show all
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derivations, you need to specify
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<literal>\*</literal>.</para></listitem>
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<listitem><para><command>nix-env</command> usability improvements:
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<itemizedlist>
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<listitem><para>An option <option>--compare-versions</option>
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(or <option>-c</option>) has been added to <command>nix-env
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--query</command> to allow you to compare installed versions of
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packages to available versions, or vice versa. An easy way to
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see if you are up to date with what’s in the channel is
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<literal>nix-env -qc \*</literal>.</para></listitem>
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<listitem><para><literal>nix-env --query</literal> now takes as
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arguments a list of package names about which to show
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information, just like <option>--install</option>, etc.: for
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example, <literal>nix-env -q gcc</literal>. Note that to show
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all derivations, you need to specify
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<literal>\*</literal>.</para></listitem>
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<listitem><para><literal>nix-env -i
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<replaceable>pkgname</replaceable></literal> will now install
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the highest available version of
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<replaceable>pkgname</replaceable>, rather than installing all
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available versions (which would probably give collisions)
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(<literal>NIX-31</literal>).</para></listitem>
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<listitem><para><literal>nix-env (-i|-u) --dry-run</literal> now
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shows exactly which missing paths will be built or
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substituted.</para></listitem>
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<listitem><para><literal>nix-env -qa --description</literal>
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shows human-readable descriptions of packages, provided that
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they have a <literal>meta.description</literal> attribute (which
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most packages in Nixpkgs don’t have yet).</para></listitem>
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</itemizedlist>
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</para></listitem>
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<listitem><para>Berkeley DB 4.4’s process registry feature is used
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to recover from crashed Nix processes.</para></listitem>
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@ -62,7 +91,8 @@ irreversible.</para></warning>
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<itemizedlist>
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<listitem><para>Reference scanning (which happens after each
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build) is much faster.</para></listitem>
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build) is much faster and takes a constant amount of
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memory.</para></listitem>
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<listitem><para>String interpolation. Expressions like
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@ -80,15 +110,23 @@ irreversible.</para></warning>
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<listitem><para>Multi-line string literals.</para></listitem>
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<listitem><para>TODO: string concatenations involving
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derivations. Consequently, the subpath operator
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<listitem><para>String concatenations can now involve
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derivations, as in the example above —
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<code>"--with-freetype2-library=" + freetype + "/lib"</code>.
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This was not previously possible because we need to register
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that a derivation that uses such a string is dependent on
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<literal>freetype</literal>. The evaluator now properly
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propagates this information. Consequently, the subpath operator
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(<literal>~</literal>) has been deprecated.</para></listitem>
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<listitem><para>TODO: function argument default values can refer
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to other function arguments
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(<literal>NIX-45</literal>)</para></listitem>
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<listitem><para>Default values of function arguments can now
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refer to other function arguments; that is, all arguments are in
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scope in the default values
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(<literal>NIX-45</literal>).</para></listitem>
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<!--
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<listitem><para>TODO: domain checks (r5895).</para></listitem>
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-->
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</itemizedlist>
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@ -108,7 +146,7 @@ irreversible.</para></warning>
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<listitem><para>New commands <command>nix-pack-closure</command> and
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<command>nix-unpack-closure</command> than can be used to easily
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transfer a stire path with all its dependencies to another machine.
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transfer a store path with all its dependencies to another machine.
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Very convenient whenever you have some package on your machine and
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you want to copy it somewhere else.</para></listitem>
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@ -187,24 +225,30 @@ irreversible.</para></warning>
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</para></listitem>
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<listitem><para>TODO: XML support in <literal>nix-env -q
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--xml</literal> and <literal>nix-instantiate --eval-only
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--xml</literal>.</para></listitem>
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<listitem><para><literal>nix-env -i
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<replaceable>pkgname</replaceable></literal> will now install the
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highest available version of <replaceable>pkgname</replaceable>,
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rather than installing all available versions (which would probably
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give collisions) (<literal>NIX-31</literal>).</para></listitem>
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<listitem><para>XML support:
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<listitem><para><literal>nix-env (-i|-u) --dry-run</literal> now
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shows exactly which missing paths will be built or
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substituted.</para></listitem>
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<itemizedlist>
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<listitem><para><literal>nix-env -q --xml</literal> prints the
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installed or available packages in an XML representation for
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easy processing by other tools.</para></listitem>
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<listitem><para><literal>nix-instantiate --eval-only
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--xml</literal> prints an XML representation of the resulting
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term. (The new flag <option>--strict</option> forces ‘deep’
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evaluation of the result, i.e., list elements and attributes are
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evaluated recursively.)</para></listitem>
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<listitem><para>In Nix expressions, the primop
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<function>builtins.toXML</function> converts a term to an XML
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representation. This is primarily useful for passing structured
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information to builders.</para></listitem>
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</itemizedlist>
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</para></listitem>
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<listitem><para><literal>nix-env -qa --description</literal> shows
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human-readable descriptions of packages, provided that they have a
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<literal>meta.description</literal> attribute (which most packages
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in Nixpkgs don’t have yet).</para></listitem>
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<listitem><para>Nix source distributions are a lot smaller now since
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we no longer include a full copy of the Berkeley DB source
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@ -215,6 +259,11 @@ irreversible.</para></warning>
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patched ATerm library</link> is used. Also, files larger than 2 GiB
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are now supported.</para></listitem>
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<listitem><para>Users of SMP and multicore machines will appreciate
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that the number of builds to be performed in parallel can now be
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specified in the configuration file in the
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<literal>build-max-jobs</literal> setting.</para></listitem>
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<listitem><para>Added support for Cygwin (Windows,
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<literal>i686-cygwin</literal>) and Mac OS X on Intel
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(<literal>i686-darwin</literal>).</para></listitem>
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@ -227,6 +276,9 @@ irreversible.</para></warning>
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</section>
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<!--==================================================================-->
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<section><title>Release 0.9.2 (September 21, 2005)</title>
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<para>This bug fix release fixes two problems on Mac OS X:
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@ -252,6 +304,8 @@ irreversible.</para></warning>
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<!--==================================================================-->
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<section><title>Release 0.9.1 (September 20, 2005)</title>
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<para>This bug fix release addresses a problem with the ATerm library
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@ -262,6 +316,8 @@ when the <option>--with-aterm</option> flag in
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<!--==================================================================-->
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<section><title>Release 0.9 (September 16, 2005)</title>
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<para>NOTE: this version of Nix uses Berkeley DB 4.3 instead of 4.2.
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@ -357,6 +413,8 @@ svnService = derivation {
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<!--==================================================================-->
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<section><title>Release 0.8.1 (April 13, 2005)</title>
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<para>This is a bug fix release.</para>
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@ -375,6 +433,8 @@ svnService = derivation {
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<!--==================================================================-->
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<section><title>Release 0.8 (April 11, 2005)</title>
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<para>NOTE: the hashing scheme in Nix 0.8 changed (as detailed below).
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@ -615,6 +675,8 @@ $ nix-env -f .../i686-linux.nix -i -E 'x: x.firefoxWrapper'</screen>
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<!--==================================================================-->
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<section><title>Release 0.7 (January 12, 2005)</title>
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<itemizedlist>
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@ -647,6 +709,8 @@ $ nix-env -f .../i686-linux.nix -i -E 'x: x.firefoxWrapper'</screen>
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<!--==================================================================-->
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<section><title>Release 0.6 (November 14, 2004)</title>
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<itemizedlist>
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@ -766,6 +830,8 @@ $ nix-env -f .../i686-linux.nix -i -E 'x: x.firefoxWrapper'</screen>
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<!--==================================================================-->
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<section><title>Release 0.5 and earlier</title>
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<para>Please refer to the Subversion commit log messages.</para>
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@ -1035,14 +1035,6 @@ weakest binding).</para>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><replaceable>e1</replaceable> ~ <replaceable>e2</replaceable></entry>
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<entry>none</entry>
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<entry>Construct a reference to a subpath of a derivation.
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E.g., <literal>hello ~ "/bin/sh"</literal> refers to the
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<filename>/bin/sh</filename> path within the Hello derivation.
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Useful in specifying derivation attributes.</entry>
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</row>
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<row>
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<entry><replaceable>e</replaceable> ?
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<replaceable>id</replaceable></entry>
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