diff --git a/flake.nix b/flake.nix
index b435c85..23c5c2b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -158,6 +158,8 @@
         packages = with pkgs; [
           cocogitto
 
+          yq
+
           rust_default
           cargo-edit
 
diff --git a/scripts/renew_copyright_header.sh b/scripts/renew_copyright_header.sh
old mode 100644
new mode 100755
index d7b0c8f..3234906
--- a/scripts/renew_copyright_header.sh
+++ b/scripts/renew_copyright_header.sh
@@ -1,3 +1,4 @@
+#! /usr/bin/env sh
 # Copyright (C) 2024 - 2024:
 # The Trinitrix Project <bpeetz@b-peetz.de, antifallobst@systemausfall.org>
 # SPDX-License-Identifier: MIT
@@ -24,11 +25,9 @@
 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 # OTHER DEALINGS IN THE SOFTWARE.
 
-#! /usr/bin/env sh
-
 # NOTE: This is the line length of the .licensure.yml header template **plus** the extra
 # line after the template comment.
-TEMPLATE_LINE_LENGTH=20
+TEMPLATE_LINE_LENGTH=26
 LATEX_TEMPLATE_LINE_LENGTH=9
 
 PROJECT_ROOT="$(git rev-parse --show-toplevel)"
@@ -41,7 +40,7 @@ remove() {
     # formatters do weird things to the file
     case "$extension" in
     # normal '#' comments (these are $TEMPLATE_LINE_LENGTH lines long)
-    "Makefile" | "toml" | "envrc" | "yml" | "gitignore" | "awk" | "lua")
+    "Makefile" | "makefile" | "toml" | "envrc" | "yml" | "gitignore" | "awk" | "lua")
         sed --in-place "1,${TEMPLATE_LINE_LENGTH}d" "$file"
         ;;
     # LaTeX files (or TeX files in general) have a different license, use the
@@ -50,7 +49,7 @@ remove() {
         sed --in-place "1,${LATEX_TEMPLATE_LINE_LENGTH}d" "$file"
         ;;
     # normal '/* ... */' like comments (these are $TEMPLATE_LINE_LENGTH + 2 lines long)
-    "c" | "h" | "md" | "rs" | "html" | "svg" | "drawio")
+    "c" | "h" | "md" | "rs" | "html" | "svg" | "drawio" | "tri")
         length="$((TEMPLATE_LINE_LENGTH + 2))"
         sed --in-place "1,${length}d;" "$file"
         ;;