Try adding /opt/homebrew to Makefile

.github/workflows/ci.yml

@@ -47,8 +47,6 @@ jobs:
       run: brew install openssl && brew info openssl
     - name: Install XQuartz
       run: brew install xquartz --cask && brew info xquartz
-    - name: Dump homebrew for debugging paths
-      run: find -L /opt/homebrew
     - name: Compile
       run: make -C GUI/xephem
     - name: Test

GUI/xephem/Makefile

@@ -32,8 +32,12 @@ endif
 
 UNAME_S = $(shell uname -s)
 ifeq ($(UNAME_S),Darwin)
-  PLATI = -I/usr/local/opt/openssl@3/include -I/opt/X11/include
-  PLATL = -L/usr/local/opt/openssl@3/lib -L/opt/X11/lib
+  PLATI = -I/opt/homebrew/include \
+          -I/usr/local/opt/openssl@3/include \
+          -I/opt/X11/include
+  PLATL = -L/opt/homebrew/include \
+          -L/usr/local/opt/openssl@3/lib \
+          -L/opt/X11/lib
 endif
 
 CC = gcc