diff --git a/lib/cfl/CMakeLists.txt b/lib/cfl/CMakeLists.txt
index 93a189936ec..83bdb3b9726 100644
--- a/lib/cfl/CMakeLists.txt
+++ b/lib/cfl/CMakeLists.txt
@@ -41,11 +41,7 @@ if(NOT MSVC)
 endif()
 
 # Define __FILENAME__ consistently across Operating Systems
-if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$$(subst ${CMAKE_SOURCE_DIR}/,,$$(abspath $$<))\"'")
-else()
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
-endif()
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
 
 
 
diff --git a/lib/cmetrics/CMakeLists.txt b/lib/cmetrics/CMakeLists.txt
index d7da71a795b..3e0a656c58c 100644
--- a/lib/cmetrics/CMakeLists.txt
+++ b/lib/cmetrics/CMakeLists.txt
@@ -61,11 +61,7 @@ if(NOT MSVC)
 endif()
 
 # Define __CMT_FILENAME__ consistently across Operating Systems
-if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__CMT_FILENAME__='\"$$(subst ${CMAKE_SOURCE_DIR}/,,$$(abspath $$<))\"'")
-else()
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__CMT_FILENAME__=__FILE__")
-endif()
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__CMT_FILENAME__=__FILE__")
 
 # Configuration options
 option(CMT_DEV                       "Enable development mode"                    No)
diff --git a/lib/ctraces/CMakeLists.txt b/lib/ctraces/CMakeLists.txt
index bb2c54fa6d8..709bac0edc6 100644
--- a/lib/ctraces/CMakeLists.txt
+++ b/lib/ctraces/CMakeLists.txt
@@ -31,11 +31,7 @@ set(CTR_VERSION_PATCH  1)
 set(CTR_VERSION_STR "${CTR_VERSION_MAJOR}.${CTR_VERSION_MINOR}.${CTR_VERSION_PATCH}")
 
 # Define __FILENAME__ consistently across Operating Systems
-if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$$(subst ${CMAKE_SOURCE_DIR}/,,$$(abspath $$<))\"'")
-else()
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
-endif()
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
 
 # Configuration options
 option(CTR_DEV             "Enable development mode"                   No)
diff --git a/lib/monkey/CMakeLists.txt b/lib/monkey/CMakeLists.txt
index 3dc1ef28a01..365551d0763 100644
--- a/lib/monkey/CMakeLists.txt
+++ b/lib/monkey/CMakeLists.txt
@@ -15,11 +15,11 @@ include(GNUInstallDirs)
 # Set default compiler options
 if (NOT CMAKE_SYSTEM_NAME MATCHES "Windows")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -Wall -Wextra")
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$$(subst ${CMAKE_SOURCE_DIR}/,,$$(abspath \$$<))\"'")
-else()
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
 endif()
 
+# Define __FILENAME__ consistently across Operating Systems
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__=__FILE__")
+
 # Monkey Version
 set(MK_VERSION_MAJOR  1)
 set(MK_VERSION_MINOR  8)