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@ -215,15 +215,10 @@
</li>
<li><a href="#_buildruntime_environments">10.5. Build/runtime environments</a>
<ul class="sectlevel3">
<li><a href="#_access_a_non_flake_package_not_in_nixpkgs">10.5.1. Access a non-flake package (not in nixpkgs)</a>
<ul class="sectlevel4">
<li><a href="#devshell-impure">If the nix derivation requires <code>nixpkgs</code></a></li>
<li><a href="#_access_a_non_flake_package_not_in_nixpkgs">10.5.1. Access a non-flake package (not in nixpkgs)</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#_special_situations">10.6. Special situations</a></li>
<li><a href="#_an_old_style_nix_shell_with_access_to_a_flake">10.7. An (old-style) Nix shell with access to a flake</a></li>
<li><a href="#_an_old_style_nix_shell_with_access_to_a_flake">10.6. An (old-style) Nix shell with access to a flake</a></li>
</ul>
</li>
</ul>
@ -4982,11 +4977,11 @@ hello-nix
<span style="color: #19177C">inputs</span> <span style="color: #666666">=</span> {
nixpkgs<span style="color: #666666">.</span><span style="color: #19177C">url</span> <span style="color: #666666">=</span> <span style="color: #BA2121">&quot;github:NixOS/nixpkgs&quot;</span>;
flake-utils<span style="color: #666666">.</span><span style="color: #19177C">url</span> <span style="color: #666666">=</span> <span style="color: #BA2121">&quot;github:numtide/flake-utils&quot;</span>;
<span style="background-color: #ffffcc"> <span style="color: #19177C">hello-nix</span> <span style="color: #666666">=</span> {
</span><span style="background-color: #ffffcc"> <span style="color: #19177C">url</span> <span style="color: #666666">=</span> <span style="color: #BA2121">&quot;git+https://codeberg.org/mhwombat/hello-nix&quot;</span>;
</span><span style="background-color: #ffffcc"> <span style="color: #19177C">flake</span> <span style="color: #666666">=</span> <span style="color: #880000">false</span>;
</span><span style="background-color: #ffffcc"> };
</span> };
<span style="color: #19177C">hello-nix</span> <span style="color: #666666">=</span> {
<span style="color: #19177C">url</span> <span style="color: #666666">=</span> <span style="color: #BA2121">&quot;git+https://codeberg.org/mhwombat/hello-nix&quot;</span>;
<span style="color: #19177C">flake</span> <span style="color: #666666">=</span> <span style="color: #880000">false</span>;
};
};
<span style="color: #19177C">outputs</span> <span style="color: #666666">=</span> { self, nixpkgs, flake-utils, hello-nix }:
flake-utils<span style="color: #666666">.</span>lib<span style="color: #666666">.</span>eachDefaultSystem (system:
@ -4994,8 +4989,8 @@ hello-nix
<span style="color: #19177C">pkgs</span> <span style="color: #666666">=</span> <span style="color: #008000">import</span> nixpkgs {
<span style="color: #008000; font-weight: bold">inherit</span> system;
};
<span style="background-color: #ffffcc"> <span style="color: #19177C">helloNix</span> <span style="color: #666666">=</span> <span style="color: #008000">import</span> hello-nix { <span style="color: #008000; font-weight: bold">inherit</span> pkgs; };
</span> <span style="color: #008000; font-weight: bold">in</span>
<span style="color: #19177C">helloNix</span> <span style="color: #666666">=</span> <span style="color: #008000">import</span> hello-nix { <span style="color: #008000; font-weight: bold">inherit</span> pkgs; };
<span style="color: #008000; font-weight: bold">in</span>
{
<span style="color: #19177C">packages</span> <span style="color: #666666">=</span> <span style="color: #008000; font-weight: bold">rec</span> {
<span style="color: #19177C">hello</span> <span style="color: #666666">=</span> pkgs<span style="color: #666666">.</span>stdenv<span style="color: #666666">.</span>mkDerivation <span style="color: #008000; font-weight: bold">rec</span> {
@ -5008,13 +5003,13 @@ hello-nix
<span style="color: #19177C">buildPhase</span> <span style="color: #666666">=</span> <span style="color: #BA2121">&quot;:&quot;</span>;
<span style="color: #19177C">installPhase</span> <span style="color: #666666">=</span>
<span style="color: #BA2121">&#39;&#39;</span>
<span style="color: #BA2121"> mkdir -p $out/bin</span>
<span style="color: #BA2121"> cp $src/hello-again $out/bin</span>
<span style="color: #BA2121"> chmod +x $out/bin/hello-again</span>
<span style="background-color: #ffffcc"> <span style="color: #BA2121">&#39;&#39;</span>
</span><span style="background-color: #ffffcc"><span style="color: #BA2121"> mkdir -p $out/bin</span>
</span><span style="background-color: #ffffcc"><span style="color: #BA2121"> cp $src/hello-again $out/bin</span>
</span><span style="color: #BA2121"> chmod +x $out/bin/hello-again</span>
<span style="color: #BA2121"> # modify the hello-again script so it can find hello-nix</span>
<span style="color: #BA2121"> HELLO=$(type -p hello-nix)</span>
<span style="background-color: #ffffcc"><span style="color: #BA2121"> # modify the hello-again script so it can find hello-nix</span>
</span><span style="color: #BA2121"> HELLO=$(type -p hello-nix)</span>
<span style="color: #BA2121"> sed &quot;s_hello-nix_&quot;$HELLO&quot;_&quot; --in-place $out/bin/hello-again</span>
<span style="color: #BA2121"> &#39;&#39;</span>;
@ -5035,8 +5030,15 @@ hello-nix
</div>
</div>
<div class="paragraph">
<p>We already covered how to add a non-flake input to a flake and build it in <a href="#devshell-nix-non-flake">Section 10.4.6, &#8220;Access a non-flake package (not in nixpkgs)&#8221;</a>;
Lines 5-8 and 17 were explained in <a href="#devshell-nix-non-flake">Section 10.4.6, &#8220;Access a non-flake package (not in nixpkgs)&#8221;</a>.</p>
<p>Lines 5-8 and 17 were explained in <a href="#devshell-nix-non-flake">Section 10.4.6, &#8220;Access a non-flake package (not in nixpkgs)&#8221;</a>.
As expected, we need to add <code>helloNix</code> as a build input, which we do in line 36.
That does make it available at build and runtime, but it doesn&#8217;t put it on the path,
so our <code>hello-again</code> script won&#8217;t be able to find it.</p>
</div>
<div class="paragraph">
<p>There are various ways to deal with this problem.
In this case we simply edited the script as we install it,
by specifying the full path to <code>hello-nix</code>.</p>
</div>
<div class="paragraph">
<p>Here&#8217;s a demonstration using the shell.</p>
@ -5044,46 +5046,19 @@ Lines 5-8 and 17 were explained in <a href="#devshell-nix-non-flake">Section 10.
<div class="literalblock">
<div class="content">
<pre class="nowrap">$ hello-nix # this will fail
bash: line 34: hello-nix: command not found
bash: line 40: hello-nix: command not found
$ nix develop
building '/nix/store/q7fkc1pi5bv5nm26iaqqxps8av935cfi-hello-again-env.drv'...
$ hello-nix
Hello from your nix package!</pre>
</div>
</div>
<div class="sect4">
<h5 id="devshell-impure">If the nix derivation requires <code>nixpkgs</code></h5>
<div class="paragraph">
<p>In this case, we need to write the derivation ourselves.
We can use <code>default.nix</code> as a model.
Line 15 should be replaced with:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="pygments highlight nowrap" style="background: #f8f8f8;"><code data-lang="nix"><span></span> <span style="color: #19177C">helloNix</span> <span style="color: #666666">=</span> pkgs<span style="color: #666666">.</span>stdenv<span style="color: #666666">.</span>mkDerivation {
<span style="color: #19177C">name</span> <span style="color: #666666">=</span> <span style="color: #BA2121">&quot;hello-nix&quot;</span>;
<span style="color: #19177C">src</span> <span style="color: #666666">=</span> hello-nix;
<span style="color: #19177C">installPhase</span> <span style="color: #666666">=</span>
<span style="color: #BA2121">&#39;&#39;</span>
<span style="color: #BA2121"> mkdir -p $out/bin</span>
<span style="color: #BA2121"> cp $src/hello-nix $out/bin/hello-nix</span>
<span style="color: #BA2121"> chmod +x $out/bin/hello-nix</span>
<span style="color: #BA2121"> &#39;&#39;</span>;
};</code></pre>
</div>
</div>
<div class="paragraph">
<p>Unresolved directive in recipes/build/main.adoc - include::non-flake/main-generated.adoc[leveloffset=+1]</p>
</div>
</div>
</div>
</div>
<div class="sect2">
<h3 id="_special_situations">10.6. Special situations</h3>
</div>
<div class="sect2">
<h3 id="_an_old_style_nix_shell_with_access_to_a_flake">10.7. An (old-style) Nix shell with access to a flake</h3>
<h3 id="_an_old_style_nix_shell_with_access_to_a_flake">10.6. An (old-style) Nix shell with access to a flake</h3>
<div class="paragraph">
<p>If you are maintaining legacy code,
you may need to provide access to a flake in a <code>nix-shell</code>.
@ -5141,7 +5116,7 @@ Hello from your flake!</pre>
</div>
<div id="footer">
<div id="footer-text">
Last updated 2025-09-13 15:16:26 IST
Last updated 2025-09-13 15:27:16 IST
</div>
</div>
</body>

6
source/recipes/build/nix-non-flake/tempwork/flake.lock generated
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@ -36,11 +36,11 @@
},
"nixpkgs": {
"locked": {
"lastModified": 1757771770,
"narHash": "sha256-/JghEYWMoO5kV+CQREWs0W+z2g27fHFAkRIP3TQZ5dI=",
"lastModified": 1757775813,
"narHash": "sha256-mHYalJeeuYTtJNPijlm4IqmxslIB+DTz/wQvz2EB/S4=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "5f7451255f69dc631d3697f274406e936584d876",
"rev": "1fb62b80407f458b29ba8168c11095858a250687",
"type": "github"
},
"original": {

2
source/recipes/main.adoc
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@ -22,6 +22,4 @@ include::devshell/main.adoc[leveloffset=+1]
include::build/main.adoc[leveloffset=+1]
== Special situations
include::nix-shell/main-generated.adoc[leveloffset=+1]