Removed some unecessary substitute call and trying to fix naming collision.

my-packages/my-games.scm

@@ -195,7 +195,7 @@ strife, chex quest, and fan-created games like harmony, hacx and freedoom.")
 
 (define-public my-barony
   (package
-   (name "barony")
+   (name "my-barony")
    (version "open-al-refresh")
    (source
     (origin
@@ -223,13 +223,7 @@ strife, chex quest, and fan-created games like harmony, hacx and freedoom.")
 	    "-DFMOD_ENABLED=OFF"	       ; enable sound
             "-DEDITOR_EXE_NAME=barony-editor") ; instead of generic "editor"
       #:tests? #f			       ; there are no tests
-      #:phases
+      ))
-      (modify-phases %standard-phases
-		     (add-before 'configure 'fix-installation
-				 (lambda _
-				   (substitute* "CMakeLists.txt"
-						(("\\$\\{CMAKE_SOURCE_DIR\\}/books")
-						 "${CMAKE_CURRENT_BINARY_DIR}/books")))))))
    (inputs
     (list glu
           libpng