diff -ruNp kde-runtime-4.14.3.orig/kioslave/thumbnail/CMakeLists.txt kde-runtime-4.14.3/kioslave/thumbnail/CMakeLists.txt
--- kde-runtime-4.14.3.orig/kioslave/thumbnail/CMakeLists.txt	2014-10-31 00:50:20.000000000 +0100
+++ kde-runtime-4.14.3/kioslave/thumbnail/CMakeLists.txt	2019-02-27 12:24:04.108561192 +0100
@@ -11,8 +11,8 @@ set_package_properties(JPEG PROPERTIES D
                        TYPE REQUIRED
                       )
 
-macro_optional_find_package(Exiv2)
-set_package_properties(Exiv2 PROPERTIES DESCRIPTION "A library to access image metadata"
+macro_optional_find_package(exiv2)
+set_package_properties(exiv2 PROPERTIES DESCRIPTION "A library to access image metadata"
                        URL "http://www.exiv2.org"
                        TYPE OPTIONAL
                        PURPOSE "Provides support for automatic rotation of JPEGs in the thumbnail kioslave"