From 543f9de75d19eb34c386ad25662beb8dd2aed5c4 Mon Sep 17 00:00:00 2001
From: fabian-mv <fabian@cluster451.org>
Date: Sat, 5 Nov 2022 19:20:01 -0600
Subject: nix: fix fontconfig in qsys launch

---
 doc/pitfalls.txt | 13 +++++++++++++
 nix/flake.nix    |  4 ++++
 2 files changed, 17 insertions(+)

diff --git a/doc/pitfalls.txt b/doc/pitfalls.txt
index d1c14d0..299c8a0 100644
--- a/doc/pitfalls.txt
+++ b/doc/pitfalls.txt
@@ -159,3 +159,16 @@ Voy a seguir con esto después.
 	===
 
 Lo útil empieza en l[ineas 2108 y 3086 del README.
+
+
+	===
+	[VI] Ejecución de Qsys (Platform Designer) de manera OS-agnóstica
+	===
+
+EL problema de NullPointerExceptions de AWT al abrir QSys en sistemas non-NixOS,
+es por configuración de fonts. Ver este caso:
+	<https://discourse.nixos.org/t/fonts-in-nix-installed-packages-on-a-non-nixos-system/5871/7>
+
+	La soloución es usar home-manager o utilizar:
+		export LOCALE_ARCHIVE="${pkgs.glibcLocales}/lib/locale/locale-archive"
+		export FONTCONFIG_FILE="${pkgs.fontconfig.out}/etc/fonts/fonts.conf"
diff --git a/nix/flake.nix b/nix/flake.nix
index 9e309a8..ac8e4b8 100644
--- a/nix/flake.nix
+++ b/nix/flake.nix
@@ -25,6 +25,10 @@
         export MAKEFLAGS="AR=gcc-ar"
         export CXXFLAGS="-O3 -flto $(pkg-config --cflags sdl2)"
         export LDFLAGS="-O3 -flto $(pkg-config --libs sdl2)"
+
+        # <https://discourse.nixos.org/t/fonts-in-nix-installed-packages-on-a-non-nixos-system/5871/7>
+        export LOCALE_ARCHIVE="${pkgs.glibcLocales}/lib/locale/locale-archive"
+        export FONTCONFIG_FILE="${pkgs.fontconfig.out}/etc/fonts/fonts.conf"
       '';
     };
   };
-- 
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