Use environment variables in the make installcheck step.

Author: dimitri

.github/workflows/build.yml

@@ -48,8 +48,14 @@ jobs:
           pg_ctl start --pgdata ./data -o '-c shared_preload_libraries=neon'
 
       - name: Minimal Check for Neon Extension
-        run: |
-          make PGHOST=/tmp PGDATA=./data PG_CONFIG=./neon/pg_install/v14/bin/pg_config -C ./neon/vendor/postgres-v14/contrib/neon installcheck
+        env:
+          PGHOST: /tmp
+          PGDATA: ./data
+          PG_CONFIG: ./neon/pg_install/v14/bin/pg_config
+        run: |
+          pwd
+          ls -l ${PG_CONFIG}
+          make -C ./neon/vendor/postgres-v14/contrib/neon installcheck
 
       - name: Stop Postgres
         run: |