Set OCaml compiler version correctly

Author: Timmmm

.github/workflows/build.yml

@@ -38,7 +38,7 @@ jobs:
     - name: Set-up OCaml
       uses: ocaml/setup-ocaml@v3
       with:
-        ocaml-compiler: 5
+        ocaml-compiler: ${{ matrix.version }}
 
     - name: Restore cached opam
       id: cache-opam-restore

.github/workflows/release.yml

@@ -84,7 +84,7 @@ jobs:
     - name: Set-up OCaml
       uses: ocaml/setup-ocaml@v3
       with:
-        ocaml-compiler: 5
+        ocaml-compiler: ${{ matrix.version }}
 
     # This must be after git has been installed otherwise Github will use a zip
     # of the code instead of git clone.

test/c/run_tests.py

@@ -229,10 +229,10 @@ def test_coq(name):
     xml += test_c('optimized C++', '-O2', '-O', True, compiler='c++', actually_cpp=True)
 
 if 'interpreter' in targets:
-    if os.name == 'nt':
-        print('Skipping interpreter tests because the interpreter is not supported on Windows')
-    else:
+    if os.name == 'posix':
         xml += test_interpreter('interpreter')
+    else:
+        print('Skipping interpreter tests because the interpreter is only supported on Unix-like platforms')
 
 if 'ocaml' in targets:
     xml += test_ocaml('OCaml')