diff --git a/.github/workflows/build-on-pull-request.yml b/.github/workflows/build-on-pull-request.yml
index bb343a9ff..41a3529b8 100644
--- a/.github/workflows/build-on-pull-request.yml
+++ b/.github/workflows/build-on-pull-request.yml
@@ -33,8 +33,6 @@ jobs:
       - name: Test that the samples can be built.
         shell: bash
         run: |
-            make SYS=c64 -C samples all
-            make SYS=c64 -C samples clean
             make SYS=apple2 -C samples
             make SYS=apple2 -C samples clean
             make SYS=apple2enh -C samples
@@ -192,8 +190,6 @@ jobs:
       - name: Build app (release)
         run: msbuild src\cc65.sln -t:rebuild -property:Configuration=Release
 
-# TODO: build samples cbm subdir for all cbm targets
-
 # TODO: fix targettest Makefile for all currently commented out targets
 # TODO: build targettest cbm subdir for all cbm targets
 # TODO: build targettest atari subdir for all atari targets