build: add libepoxy

Add libepoxy dependency to CI manifest and Nix.

For Nix, we need to set shellHook to workaround a NixOS limitation, see:

NixOS/nixpkgs#287763

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>

.builds/freebsd.yml

@@ -12,6 +12,7 @@ packages:
   - uthash
   - libconfig
   - libglvnd
+  - libepoxy
   - dbus
   - pcre
 sources:

.editorconfig

@@ -3,3 +3,6 @@ root = true
 indent_style = tab
 indent_size = 8
 max_line_length = 90
+[*.nix]
+indent_style = space
+indent_size = 2

flake.nix

@@ -24,16 +24,20 @@
     overlays = [ overlay ];
   in rec {
     inherit overlay overlays;
-    defaultPackage = pkgs.picom.overrideAttrs {
+    defaultPackage = pkgs.picom.overrideAttrs (o: {
       version = "11";
       src = ./.;
-    };
+      buildInputs = o.buildInputs ++ [ pkgs.libepoxy ];
+    });
     devShell = defaultPackage.overrideAttrs {
-      buildInputs = defaultPackage.buildInputs ++ [
-        pkgs.clang-tools_17
-        pkgs.llvmPackages_17.clang-unwrapped.python
-      ];
+      buildInputs = defaultPackage.buildInputs ++ (with pkgs; [
+        clang-tools_17
+        llvmPackages_17.clang-unwrapped.python
+      ]);
       hardeningDisable = [ "fortify" ];
+      shellHook = ''
+        export LD_LIBRARY_PATH+=":/run/opengl-driver/lib"
+      '';
     };
   });
 }