anchor.diff:  			     (find-library-version library version)
   			     (first (library-versions library)))))
       ;; Load libraries metadata
  -    (load-library-version library-version)
  +    (load-library-version-metadata library-version)
   
       ;; Calculate list of library-versions involved
       (let ((library-versions-involved
  
positive.code:   "Calculates the library versions to install for a given LIBRARY-VERSION"
  
    ;; Load libraries metadata
    (load-library-version library-version)
  
    ;; Calculate list of library-versions involved
    (let ((library-versions-involved
  
negative.code: 				     (find-library-version (library project) version)
  				     (first (library-versions (library project))))))
  	    ;; Load libraries metadata
  	    (load-library-version-metadata library-version)
  
  	    ;; Calculate list of library-versions involved
  	    (let ((library-versions-involved
  