How to install halcompile

I'm not sure which dev version is correct, but I just tried installing some.
but I can not install linuxcnc-dev.
Which dev version need to install ?

pi@raspberrypi:~/linuxcnc $ sudo gdebi /home/pi/Downloads/linuxcnc-uspace-dev_2.8.0_pre1.6129.gf5b699979_armhf.deb
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading state information... Done
This package is uninstallable
Dependency is not satisfiable: linuxcnc-uspace (= 1:2.8.0~pre1.6129.gf5b699979)
pi@raspberrypi:~/linuxcnc $

pi@raspberrypi:/ $ sudo apt-get install linuxcnc-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package linuxcnc-dev
pi@raspberrypi:/ $

pi@raspberrypi:/ $ sudo apt-get install halcompile
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package halcompile
pi@raspberrypi:/ $

Finally done
It took a very long time due to lack of knowledge.
I can use halcompile .

cd /home/pi/
sudo apt-get install python-serial
sudo dpkg -i linuxcnc-uspace-dev_2.8.0~pre1_armhf.deb

Thank you

I have been trying to install halcompile as well. Pi 4, with Linuxcnc preempt rt 2.8.0 Debian 10 from linuxcnc.org/iso/linuxcnc-2.8.0-pi4.zip

Following the above example fails with: "dpkg: error: cannot access archive 'linuxcnc-uspace-dev_2.8.0~pre1_armhf.deb': No such file or directory"

same problem with sudo dpkg -i linuxcnc-uspace-dev_2.8.0_armhf.deb.

any help would be appreciated.

I would expect halcompile to already be installed.

If not:

sudo apt-get install linuxcnc-uspace-dev

Should download and install it.

Thank you. That was very helpful. Now on to building Pi4 based system for my 3 axis router.