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Amy de Buitléir 2025-09-15 15:53:36 +01:00
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@ -5146,99 +5146,7 @@ However, you can use any of the flake reference styles defined in <a href="#flak
<div class="listingblock">
<div class="title">flake.nix</div>
<div class="content">
<pre class="pygments highlight nowrap"><code data-lang="nix"><div class="lineno"><table class="linenotable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
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<span class="normal">47</span></pre></div></td><td class="code"><div><pre><span></span><span class="tok-p">{</span>
<span class="tok-ss">inputs</span> <span class="tok-o">=</span> <span class="tok-p">{</span>
nixpkgs<span class="tok-o">.</span><span class="tok-ss">url</span> <span class="tok-o">=</span> <span class="tok-s2">&quot;github:NixOS/nixpkgs&quot;</span><span class="tok-p">;</span>
flake-utils<span class="tok-o">.</span><span class="tok-ss">url</span> <span class="tok-o">=</span> <span class="tok-s2">&quot;github:numtide/flake-utils&quot;</span><span class="tok-p">;</span>
<span class="hll"> hello-flake<span class="tok-o">.</span><span class="tok-ss">url</span> <span class="tok-o">=</span> <span class="tok-s2">&quot;git+https://codeberg.org/mhwombat/hello-flake&quot;</span><span class="tok-p">;</span>
</span> <span class="tok-p">};</span>
<span class="hll"> <span class="tok-ss">outputs</span> <span class="tok-o">=</span> <span class="tok-p">{</span> self<span class="tok-p">,</span> nixpkgs<span class="tok-p">,</span> flake-utils<span class="tok-p">,</span> hello-flake <span class="tok-p">}:</span>
</span> flake-utils<span class="tok-o">.</span>lib<span class="tok-o">.</span>eachDefaultSystem <span class="tok-p">(</span>system<span class="tok-p">:</span>
<span class="tok-k">let</span>
<span class="tok-ss">pkgs</span> <span class="tok-o">=</span> <span class="tok-nb">import</span> nixpkgs <span class="tok-p">{</span> <span class="tok-k">inherit</span> system<span class="tok-p">;</span> <span class="tok-p">};</span>
<span class="tok-k">in</span>
<span class="tok-p">{</span>
<span class="tok-ss">packages</span> <span class="tok-o">=</span> <span class="tok-k">rec</span> <span class="tok-p">{</span>
<span class="tok-ss">hello</span> <span class="tok-o">=</span> pkgs<span class="tok-o">.</span>stdenv<span class="tok-o">.</span>mkDerivation <span class="tok-k">rec</span> <span class="tok-p">{</span>
<span class="tok-ss">name</span> <span class="tok-o">=</span> <span class="tok-s2">&quot;hello-again&quot;</span><span class="tok-p">;</span>
<span class="tok-ss">src</span> <span class="tok-o">=</span> <span class="tok-l">./.</span><span class="tok-p">;</span>
<span class="tok-ss">unpackPhase</span> <span class="tok-o">=</span> <span class="tok-s2">&quot;true&quot;</span><span class="tok-p">;</span>
<span class="tok-ss">buildPhase</span> <span class="tok-o">=</span> <span class="tok-s2">&quot;:&quot;</span><span class="tok-p">;</span>
<span class="tok-ss">installPhase</span> <span class="tok-o">=</span>
<span class="tok-s tok-s-Multiline">&#39;&#39;</span>
<span class="tok-s tok-s-Multiline"> mkdir -p $out/bin</span>
<span class="tok-s tok-s-Multiline"> cp $src/hello-again $out/bin</span>
<span class="tok-s tok-s-Multiline"> chmod +x $out/bin/hello-again</span>
<span class="hll"><span class="tok-s tok-s-Multiline"> # modify the hello-again script so it can find hello-flake</span>
</span><span class="hll"><span class="tok-s tok-s-Multiline"> HELLO=$(type -p hello-flake)</span>
</span><span class="hll"><span class="tok-s tok-s-Multiline"> sed &quot;s_hello-nix_&quot;$HELLO&quot;_&quot; --in-place $out/bin/hello-again</span>
</span><span class="tok-s tok-s-Multiline"> &#39;&#39;</span><span class="tok-p">;</span>
<span class="hll"> <span class="tok-ss">buildInputs</span> <span class="tok-o">=</span> <span class="tok-p">[</span> hello-flake <span class="tok-p">];</span>
</span> <span class="tok-p">};</span>
<span class="tok-ss">default</span> <span class="tok-o">=</span> hello<span class="tok-p">;</span>
<span class="tok-p">};</span>
<span class="tok-ss">apps</span> <span class="tok-o">=</span> <span class="tok-k">rec</span> <span class="tok-p">{</span>
<span class="tok-ss">hello</span> <span class="tok-o">=</span> flake-utils<span class="tok-o">.</span>lib<span class="tok-o">.</span>mkApp <span class="tok-p">{</span> <span class="tok-ss">drv</span> <span class="tok-o">=</span> self<span class="tok-o">.</span>packages<span class="tok-o">.</span><span class="tok-si">${</span>system<span class="tok-si">}</span><span class="tok-o">.</span>hello<span class="tok-p">;</span> <span class="tok-p">};</span>
<span class="tok-ss">default</span> <span class="tok-o">=</span> hello<span class="tok-p">;</span>
<span class="tok-p">};</span>
<span class="tok-p">}</span>
<span class="tok-p">);</span>
<span class="tok-p">}</span>
<pre class="pygments highlight nowrap"><code data-lang="nix"><div class="lineno"><table class="linenotable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span>cat<span class="tok-p">:</span> flake<span class="tok-o">.</span>nix<span class="tok-p">:</span> No such file <span class="tok-ow">or</span> directory
</pre></div></td></tr></table></div></code></pre>
</div>
</div>
@ -5248,24 +5156,12 @@ However, you can use any of the flake reference styles defined in <a href="#flak
<div class="literalblock">
<div class="content">
<pre class="nowrap">$ nix run
error:
… while calling the 'getAttr' builtin
at &lt;nix/derivation-internal.nix&gt;:50:17:
49| value = commonAttrs // {
50| outPath = builtins.getAttr outputName strict;
| ^
51| drvPath = strict.drvPath;
path '/home/amy/codeberg/nix-book/source/recipes/build/flake/tempwork' does not contain a 'flake.nix', searching up
error: Path 'source/recipes/build/flake' in the repository "/home/amy/codeberg/nix-book" is not tracked by Git.
… while calling the 'derivationStrict' builtin
at &lt;nix/derivation-internal.nix&gt;:37:12:
36|
37| strict = derivationStrict drvAttrs;
| ^
38|
To make it visible to Nix, run:
(stack trace truncated; use '--show-trace' to show the full, detailed trace)
error: Dependency is not of a valid type: element 1 of buildInputs for hello-again</pre>
git -C "/home/amy/codeberg/nix-book" add "source/recipes/build/flake"</pre>
</div>
</div>
<div class="paragraph">
@ -5588,7 +5484,7 @@ Hello from your flake!</pre>
</div>
<div id="footer">
<div id="footer-text">
Last updated 2025-09-15 15:50:39 IST
Last updated 2025-09-15 15:52:55 IST
</div>
</div>
</body>

128
source/recipes/build/flake/tempwork/flake.lock generated Normal file
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@ -0,0 +1,128 @@
{
"nodes": {
"flake-utils": {
"inputs": {
"systems": "systems"
},
"locked": {
"lastModified": 1731533236,
"narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"flake-utils_2": {
"inputs": {
"systems": "systems_2"
},
"locked": {
"lastModified": 1731533236,
"narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"hello-flake": {
"inputs": {
"flake-utils": "flake-utils_2",
"nixpkgs": "nixpkgs"
},
"locked": {
"lastModified": 1757875192,
"narHash": "sha256-JBkm6NAOYjR3Sc3BxJ2ijrTqW8Ga0NlN9GPUJ/NUsGM=",
"ref": "refs/heads/main",
"rev": "2d9363f255c44a41be2e5291dd624e078e7f4139",
"revCount": 25,
"type": "git",
"url": "https://codeberg.org/mhwombat/hello-flake"
},
"original": {
"type": "git",
"url": "https://codeberg.org/mhwombat/hello-flake"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1757873102,
"narHash": "sha256-kYhNxLlYyJcUouNRazBufVfBInMWMyF+44xG/xar2yE=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "88cef159e47c0dc56f151593e044453a39a6e547",
"type": "github"
},
"original": {
"owner": "NixOS",
"repo": "nixpkgs",
"type": "github"
}
},
"nixpkgs_2": {
"locked": {
"lastModified": 1757945769,
"narHash": "sha256-z/SdByTaDnEx4Zj0pyMwzY+uKxV/2TpQQ6ZKijKc2t0=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "62b2408b85dc46dab0b8ca4250471b9cb23425f0",
"type": "github"
},
"original": {
"owner": "NixOS",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"flake-utils": "flake-utils",
"hello-flake": "hello-flake",
"nixpkgs": "nixpkgs_2"
}
},
"systems": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_2": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
}
},
"root": "root",
"version": 7
}

47
source/recipes/build/flake/tempwork/flake.nix Normal file
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@ -0,0 +1,47 @@
{
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs";
flake-utils.url = "github:numtide/flake-utils";
hello-flake.url = "git+https://codeberg.org/mhwombat/hello-flake";
};
outputs = { self, nixpkgs, flake-utils, hello-flake }:
flake-utils.lib.eachDefaultSystem (system:
let
pkgs = import nixpkgs { inherit system; };
in
{
packages = rec {
hello = pkgs.stdenv.mkDerivation rec {
name = "hello-again";
src = ./.;
unpackPhase = "true";
buildPhase = ":";
installPhase =
''
mkdir -p $out/bin
cp $src/hello-again $out/bin
chmod +x $out/bin/hello-again
# modify the hello-again script so it can find hello-flake
HELLO=$(type -p hello-flake)
sed "s_hello-nix_"$HELLO"_" --in-place $out/bin/hello-again
'';
buildInputs = [ hello-flake ];
};
default = hello;
};
apps = rec {
hello = flake-utils.lib.mkApp { drv = self.packages.${system}.hello; };
default = hello;
};
}
);
}

4
source/recipes/build/flake/tempwork/hello-again Executable file
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@ -0,0 +1,4 @@
#!/usr/bin/env sh
echo "I'm a flake, but I'm running a command defined in a non-flake package."
hello-nix