Trying to install ptouch-print:

$ git clone https://git.familie-radermacher.ch/linux/ptouch-print.git
Cloning into 'ptouch-print'...
Fetching objects: 794, done.
$ cd ptouch-print/
$ ./compile.sh 
Found GD: NO
CMake Error at cmake/FindGD.cmake:109 (MESSAGE):
  Could not find GD library
Call Stack (most recent call first):
  CMakeLists.txt:13 (find_package)
-- Configuring incomplete, errors occurred!

So I thought maybe libgd was not installed, but it is, so where am I going wrong?

$ apt list --installed | grep libgd3
libgd3/noble,now 2.3.3-9ubuntu5 amd64 [installed]