From ed2072a5206ed1f08f1f4e8f170203fc5dd4e686 Mon Sep 17 00:00:00 2001
From: pancaek <20342389+pancaek@users.noreply.github.com>
Date: Tue, 27 Jan 2026 10:29:29 -0800
Subject: [PATCH 1/2] installFonts: init hook

---
 .../setup-hooks/install-fonts.sh              | 50 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  4 ++
 2 files changed, 54 insertions(+)
 create mode 100644 pkgs/build-support/setup-hooks/install-fonts.sh

diff --git a/pkgs/build-support/setup-hooks/install-fonts.sh b/pkgs/build-support/setup-hooks/install-fonts.sh
new file mode 100644
index 000000000000..15edd18c9a36
--- /dev/null
+++ b/pkgs/build-support/setup-hooks/install-fonts.sh
@@ -0,0 +1,50 @@
+# shellcheck shell=bash
+
+# Setup hook that installs font files to their respective locations.
+#
+# Example usage in a derivation:
+#
+#   { …, installFonts, … }:
+#
+#   stdenvNoCC.mkDerivation {
+#     …
+#     outputs = [
+#       "out"
+#       "webfont" # If .woff or .woff2 output is desired
+#     ];
+#
+#     nativeBuildInputs = [ installFonts ];
+#     …
+#   }
+#
+# This hook also provides an `installFont` function that can be used to install
+# additional fonts of a particular extension into their respective folder.
+#
+postInstallHooks+=(installFonts)
+
+installFont() {
+  if (($# != 2)); then
+    nixErrorLog "expected 2 arguments!"
+    nixErrorLog "usage: installFont fontExt outDir"
+    exit 1
+  fi
+
+  find -iname "*.$1" -print0 | xargs -0 -r install -m644 -D -t "$2"
+}
+
+installFonts() {
+  if [ "${dontInstallFonts-}" == 1 ]; then return; fi
+
+  installFont 'ttf' "$out/share/fonts/truetype"
+  installFont 'ttc' "$out/share/fonts/truetype"
+  installFont 'otf' "$out/share/fonts/opentype"
+  installFont 'bdf' "$out/share/fonts/misc"
+  installFont 'otb' "$out/share/fonts/misc"
+  installFont 'psf' "$out/share/consolefonts"
+
+  if [ -n "${webfont-}" ]; then
+    installFont 'woff' "$webfont/share/fonts/woff"
+    installFont 'woff2' "$webfont/share/fonts/woff2"
+  fi
+
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b0bec92c53e1..3bd749fbdfcf 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -710,6 +710,10 @@ with pkgs;
 
   makeDesktopItem = callPackage ../build-support/make-desktopitem { };
 
+  installFonts = makeSetupHook {
+    name = "install-fonts-hook";
+  } ../build-support/setup-hooks/install-fonts.sh;
+
   copyPkgconfigItems = makeSetupHook {
     name = "copy-pkg-config-items-hook";
   } ../build-support/setup-hooks/copy-pkgconfig-items.sh;

From 18879293e2b7550671bd3eaac9fcc8b24f44e323 Mon Sep 17 00:00:00 2001
From: pancaek <20342389+pancaek@users.noreply.github.com>
Date: Tue, 27 Jan 2026 10:30:27 -0800
Subject: [PATCH 2/2] barlow: use installFonts hook

---
 pkgs/by-name/ba/barlow/package.nix | 24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

diff --git a/pkgs/by-name/ba/barlow/package.nix b/pkgs/by-name/ba/barlow/package.nix
index dc0b0439c40f..65662de4b279 100644
--- a/pkgs/by-name/ba/barlow/package.nix
+++ b/pkgs/by-name/ba/barlow/package.nix
@@ -2,30 +2,26 @@
   lib,
   stdenvNoCC,
   fetchFromGitHub,
+  installFonts,
 }:
 
-stdenvNoCC.mkDerivation rec {
+stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "barlow";
   version = "1.422";
 
+  outputs = [
+    "out"
+    "webfont"
+  ];
+
   src = fetchFromGitHub {
     owner = "jpt";
     repo = "barlow";
-    tag = version;
+    tag = finalAttrs.version;
     hash = "sha256-FG68o6qN/296RhSNDHFXYXbkhlXSZJgGhVjzlJqsksY=";
   };
 
-  installPhase = ''
-    runHook preInstall
-
-    install -Dm644 fonts/otf/*.otf -t $out/share/fonts/opentype
-    install -Dm644 fonts/ttf/*.ttf fonts/gx/*.ttf -t $out/share/fonts/truetype
-    install -Dm644 fonts/eot/*.eot -t $out/share/fonts/eot
-    install -Dm644 fonts/woff/*.woff -t $out/share/fonts/woff
-    install -Dm644 fonts/woff2/*.woff2 -t $out/share/fonts/woff2
-
-    runHook postInstall
-  '';
+  nativeBuildInputs = [ installFonts ];
 
   meta = {
     description = "Grotesk variable font superfamily";
@@ -34,4 +30,4 @@ stdenvNoCC.mkDerivation rec {
     maintainers = [ ];
     platforms = lib.platforms.all;
   };
-}
+})