diff -urN openexr-2.5.1.orig/IlmBase/config/CMakeLists.txt openexr-2.5.1/IlmBase/config/CMakeLists.txt
--- openexr-2.5.1.orig/IlmBase/config/CMakeLists.txt	2020-05-11 15:53:42.000000000 +0000
+++ openexr-2.5.1/IlmBase/config/CMakeLists.txt	2020-05-14 05:53:22.969725396 +0000
@@ -75,9 +75,9 @@
   # use a helper function to avoid variable pollution, but pretty simple
   function(ilmbase_pkg_config_help pcinfile)
     set(prefix ${CMAKE_INSTALL_PREFIX})
-    set(exec_prefix "\${prefix}")
-    set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
-    set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
+    set(exec_prefix ${CMAKE_INSTALL_BINDIR})
+    set(libdir ${CMAKE_INSTALL_FULL_LIBDIR})
+    set(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR})
     set(LIB_SUFFIX_DASH ${ILMBASE_LIB_SUFFIX})
     if(TARGET Threads::Threads)
       # hrm, can't use properties as they end up as generator expressions
diff -urN openexr-2.5.1.orig/OpenEXR/config/CMakeLists.txt openexr-2.5.1/OpenEXR/config/CMakeLists.txt
--- openexr-2.5.1.orig/OpenEXR/config/CMakeLists.txt	2020-05-11 15:53:42.000000000 +0000
+++ openexr-2.5.1/OpenEXR/config/CMakeLists.txt	2020-05-14 05:53:57.064665826 +0000
@@ -72,9 +72,9 @@
   # use a helper function to avoid variable pollution, but pretty simple
   function(openexr_pkg_config_help pcinfile)
     set(prefix ${CMAKE_INSTALL_PREFIX})
-    set(exec_prefix "\${prefix}")
-    set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
-    set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
+    set(exec_prefix ${CMAKE_INSTALL_BINDIR})
+    set(libdir ${CMAKE_INSTALL_FULL_LIBDIR})
+    set(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR})
     set(LIB_SUFFIX_DASH ${OPENEXR_LIB_SUFFIX})
     if(TARGET Threads::Threads)
       # hrm, can't use properties as they end up as generator expressions