diff --git a/pkgs/applications/terminal-emulators/blackbox-terminal/default.nix b/pkgs/applications/terminal-emulators/blackbox-terminal/default.nix
index 5b8e0078d75c..f71a9dce894f 100644
--- a/pkgs/applications/terminal-emulators/blackbox-terminal/default.nix
+++ b/pkgs/applications/terminal-emulators/blackbox-terminal/default.nix
@@ -72,6 +72,9 @@ stdenv.mkDerivation rec {
         rev = "3c8f66be867aca6656e4109ce880b6ea7431b895";
         hash = "sha256-vz9ircmPy2Q4fxNnjurkgJtuTSS49rBq/m61p1B43eU=";
       };
+      postPatch = (old.postPatch or "") + ''
+        patchShebangs src/box_drawing_generate.sh
+      '';
     } // lib.optionalAttrs sixelSupport {
       buildInputs = old.buildInputs ++ [ libsixel ];
       mesonFlags = old.mesonFlags ++ [ "-Dsixel=true" ];
diff --git a/pkgs/development/libraries/vte/default.nix b/pkgs/development/libraries/vte/default.nix
index d160f7433218..d5194ea29949 100644
--- a/pkgs/development/libraries/vte/default.nix
+++ b/pkgs/development/libraries/vte/default.nix
@@ -27,6 +27,7 @@
 , systemd
 , systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemd
 , nixosTests
+, blackbox-terminal
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -117,6 +118,7 @@ stdenv.mkDerivation (finalAttrs: {
     };
     tests = {
       inherit (nixosTests.terminal-emulators) gnome-terminal lxterminal mlterm roxterm sakura stupidterm terminator termite xfce4-terminal;
+      blackbox-terminal = blackbox-terminal.override { sixelSupport = true; };
     };
   };