Use 'mlambda' instead of 'memoize'.

* gnu/packages.scm (find-newest-available-packages): Use 'mlambda'
instead of (memoize (lambda ...) ...).
* gnu/packages/bootstrap.scm (package-with-bootstrap-guile): Likewise.
* guix/build-system/gnu.scm (package-with-explicit-inputs)[rewritten-input]:
Likewise.
* guix/build-system/python.scm (package-with-explicit-python)[transform]:
Likewise.
* guix/derivations.scm (derivation->string): Likewise.
* guix/gnu-maintenance.scm (gnu-package?): Likewise.
* guix/modules.scm (module-file-dependencies): Likewise.
* guix/scripts/graph.scm (standard-package-set): Likewise.
* guix/scripts/lint.scm (official-gnu-packages*): Likewise.
* guix/store.scm (store-regexp*): Likewise.
* guix/utils.scm (location): Likewise.

2 files changed, 32 insertions, 34 deletions

diff --git a/gnu/packages.scm b/gnu/packages.scm
index ec2473422f4..0aa289d56c0 100644
--- a/gnu/packages.scm
+++ b/gnu/packages.scm
@@ -235,28 +235,27 @@ decreasing version order."
             matching)))))
 
 (define find-newest-available-packages
-  (memoize
-   (lambda ()
-     "Return a vhash keyed by package names, and with
+  (mlambda ()
+    "Return a vhash keyed by package names, and with
 associated values of the form
 
   (newest-version newest-package ...)
 
 where the preferred package is listed first."
 
-     ;; FIXME: Currently, the preferred package is whichever one
-     ;; was found last by 'fold-packages'.  Find a better solution.
-     (fold-packages (lambda (p r)
-                      (let ((name    (package-name p))
-                            (version (package-version p)))
-                        (match (vhash-assoc name r)
-                          ((_ newest-so-far . pkgs)
-                           (case (version-compare version newest-so-far)
-                             ((>) (vhash-cons name `(,version ,p) r))
-                             ((=) (vhash-cons name `(,version ,p ,@pkgs) r))
-                             ((<) r)))
-                          (#f (vhash-cons name `(,version ,p) r)))))
-                    vlist-null))))
+    ;; FIXME: Currently, the preferred package is whichever one
+    ;; was found last by 'fold-packages'.  Find a better solution.
+    (fold-packages (lambda (p r)
+                     (let ((name    (package-name p))
+                           (version (package-version p)))
+                       (match (vhash-assoc name r)
+                         ((_ newest-so-far . pkgs)
+                          (case (version-compare version newest-so-far)
+                            ((>) (vhash-cons name `(,version ,p) r))
+                            ((=) (vhash-cons name `(,version ,p ,@pkgs) r))
+                            ((<) r)))
+                         (#f (vhash-cons name `(,version ,p) r)))))
+                   vlist-null)))
 
 (define (find-best-packages-by-name name version)
   "If version is #f, return the list of packages named NAME with the highest
diff --git a/gnu/packages/bootstrap.scm b/gnu/packages/bootstrap.scm
index 7cde51fff80..c8d94c83036 100644
--- a/gnu/packages/bootstrap.scm
+++ b/gnu/packages/bootstrap.scm
@@ -131,30 +131,29 @@ successful, or false to signal an error."
     (license gpl3+)))
 
 (define package-with-bootstrap-guile
-  (memoize
-   (lambda (p)
+  (mlambda (p)
     "Return a variant of P such that all its origins are fetched with
 %BOOTSTRAP-GUILE."
     (define rewritten-input
       (match-lambda
-       ((name (? origin? o))
-        `(,name ,(bootstrap-origin o)))
-       ((name (? package? p) sub-drvs ...)
-        `(,name ,(package-with-bootstrap-guile p) ,@sub-drvs))
-       (x x)))
+        ((name (? origin? o))
+         `(,name ,(bootstrap-origin o)))
+        ((name (? package? p) sub-drvs ...)
+         `(,name ,(package-with-bootstrap-guile p) ,@sub-drvs))
+        (x x)))
 
     (package (inherit p)
-      (source (match (package-source p)
-                ((? origin? o) (bootstrap-origin o))
-                (s s)))
-      (inputs (map rewritten-input
-                   (package-inputs p)))
-      (native-inputs (map rewritten-input
-                          (package-native-inputs p)))
-      (propagated-inputs (map rewritten-input
-                              (package-propagated-inputs p)))
-      (replacement (and=> (package-replacement p)
-                          package-with-bootstrap-guile))))))
+             (source (match (package-source p)
+                       ((? origin? o) (bootstrap-origin o))
+                       (s s)))
+             (inputs (map rewritten-input
+                          (package-inputs p)))
+             (native-inputs (map rewritten-input
+                                 (package-native-inputs p)))
+             (propagated-inputs (map rewritten-input
+                                     (package-propagated-inputs p)))
+             (replacement (and=> (package-replacement p)
+                                 package-with-bootstrap-guile)))))
 
 (define* (glibc-dynamic-linker
           #:optional (system (or (and=> (%current-target-system)