tweak the workflows

Author: phlptp

.github/workflows/tests.yml

@@ -149,7 +149,7 @@ jobs:
       #- name: Add pkgconfig
       #  run: sudo apt-get update && sudo apt-get install -y pkgconfig
       - name: Configure
-        run: cmake -S . -B build -DCLI11_INSTALL_PACKAGE_TESTS=ON
+        run: cmake -S . -B build -DCLI11_INSTALL_PACKAGE_TESTS=ON -DCMAKE_INSTALL_PREFIX=/home/runner/work/install
       - name: Build
         run: cmake --build build  -j2
       - name: install

tests/CMakeLists.txt

@@ -281,7 +281,7 @@ endif()
 if(CLI11_INSTALL_PACKAGE_TESTS)
   set(CLI11_PACKAGE_SEARCH_LOC)
 else()
-  set(CLI11_PACKAGE_SEARCH_LOC "-DCLI11_DIR=${PROJECT_BINARY_DIR}")
+  set(CLI11_PACKAGE_SEARCH_LOC "-DCLI11_DIR=${CMAKE_INSTALL_PREFIX}")
 endif()
 
 # tests of the cmake package and pkg-config package