diff --git a/guix/scripts/build.scm b/guix/scripts/build.scm
index 65a125263d..4b86047587 100644
--- a/guix/scripts/build.scm
+++ b/guix/scripts/build.scm
@@ -233,7 +233,7 @@ matching URIs given in SOURCES."
                         (string-drop uri (+ 1 index))))))))
          sources))
 
-  (lambda (store obj)
+  (lambda (obj)
     (let loop ((sources  new-sources)
                (result   '()))
       (match obj
@@ -276,7 +276,7 @@ called \"guile\" must be replaced with a dependency on a version 2.1 of
                                                    (lambda (old new)
                                                      new)))
          (rewrite      (package-input-rewriting/spec replacements)))
-    (lambda (store obj)
+    (lambda (obj)
       (if (package? obj)
           (rewrite obj)
           obj))))
@@ -292,7 +292,7 @@ current 'gnutls' package, after which version 3.5.4 is grafted onto them."
   (let* ((replacements (evaluate-replacement-specs replacement-specs
                                                    set-replacement))
          (rewrite      (package-input-rewriting/spec replacements)))
-    (lambda (store obj)
+    (lambda (obj)
       (if (package? obj)
           (rewrite obj)
           obj))))
@@ -349,7 +349,7 @@ strings like \"guile-next=stable-3.0\" meaning that packages are built using
   (let* ((replacements (evaluate-git-replacement-specs replacement-specs
                                                        replace))
          (rewrite      (package-input-rewriting/spec replacements)))
-    (lambda (store obj)
+    (lambda (obj)
       (if (package? obj)
           (rewrite obj)
           obj))))
@@ -377,7 +377,7 @@ strings like \"guile-next=cabba9e\" meaning that packages are built using
   (let* ((replacements (evaluate-git-replacement-specs replacement-specs
                                                        replace))
          (rewrite      (package-input-rewriting/spec replacements)))
-    (lambda (store obj)
+    (lambda (obj)
       (if (package? obj)
           (rewrite obj)
           obj))))
@@ -405,7 +405,7 @@ a checkout of the Git repository at the given URL."
   (define rewrite
     (package-input-rewriting/spec replacements))
 
-  (lambda (store obj)
+  (lambda (obj)
     (if (package? obj)
         (rewrite obj)
         obj)))
@@ -478,7 +478,7 @@ the equal sign."
                      spec))))
          replacement-specs))
 
-  (lambda (store obj)
+  (lambda (obj)
     (if (package? obj)
         (or (any (match-lambda
                    ((bottom . toolchain)
@@ -516,7 +516,7 @@ to the same package but with #:strip-binaries? #f in its 'arguments' field."
                                          (cons spec package-with-debug-info))
                                        specs)))
 
-  (lambda (store obj)
+  (lambda (obj)
     (if (package? obj)
         (rewrite obj)
         obj)))
@@ -535,7 +535,7 @@ to the same package but with #:strip-binaries? #f in its 'arguments' field."
                                          (cons spec package-without-tests))
                                        specs)))
 
-  (lambda (store obj)
+  (lambda (obj)
     (if (package? obj)
         (rewrite obj)
         obj)))
@@ -646,7 +646,7 @@ derivation, etc.), applies the transformations specified by OPTS."
                              applicable))
                     ,@(package-properties p)))))
 
-  (lambda (store obj)
+  (lambda (obj)
     (define (tagged-object new)
       (if (and (not (eq? obj new))
                (package? new) (not (null? applicable)))
@@ -656,7 +656,7 @@ derivation, etc.), applies the transformations specified by OPTS."
     (tagged-object
      (fold (match-lambda*
              (((name value transform) obj)
-              (let ((new (transform store obj)))
+              (let ((new (transform obj)))
                 (when (eq? new obj)
                   (warning (G_ "transformation '~a' had no effect on ~a~%")
                            name
@@ -1113,8 +1113,7 @@ build."
       (systems systems)))
 
   (define things-to-build
-    (map (cut transform store <>)
-         (options->things-to-build opts)))
+    (map transform (options->things-to-build opts)))
 
   (define (compute-derivation obj system)
     ;; Compute the derivation of OBJ for SYSTEM.
diff --git a/guix/scripts/environment.scm b/guix/scripts/environment.scm
index 91ce2af9bb..4db6c5d2d7 100644
--- a/guix/scripts/environment.scm
+++ b/guix/scripts/environment.scm
@@ -320,7 +320,7 @@ for the corresponding packages."
                    (manifest-entry-output e2))))
 
   (define transform
-    (cut (options->transformation opts) store <>))
+    (options->transformation opts))
 
   (define* (package->manifest-entry* package #:optional (output "out"))
     (package->manifest-entry (transform package) output))
diff --git a/guix/scripts/graph.scm b/guix/scripts/graph.scm
index 0d11fc9795..6b2e60d7e2 100644
--- a/guix/scripts/graph.scm
+++ b/guix/scripts/graph.scm
@@ -582,11 +582,11 @@ Emit a representation of the dependency graph of PACKAGE...\n"))
                                       (('argument . (? store-path? item))
                                        item)
                                       (('argument . spec)
-                                       (transform store
-                                                  (specification->package spec)))
+                                       (transform
+                                        (specification->package spec)))
                                       (('expression . exp)
-                                       (transform store
-                                                  (read/eval-package-expression exp)))
+                                       (transform
+                                        (read/eval-package-expression exp)))
                                       (_ #f))
                                     opts)))
         (run-with-store store
diff --git a/guix/scripts/pack.scm b/guix/scripts/pack.scm
index a5a70d5162..8a6aa2882b 100644
--- a/guix/scripts/pack.scm
+++ b/guix/scripts/pack.scm
@@ -1116,9 +1116,9 @@ Create a bundle of PACKAGE.\n"))
     (let* ((transform     (options->transformation opts))
            (packages      (map (match-lambda
                                  (((? package? package) output)
-                                  (list (transform store package) output))
+                                  (list (transform package) output))
                                  ((? package? package)
-                                  (list (transform store package) "out")))
+                                  (list (transform package) "out")))
                                (reverse
                                 (filter-map maybe-package-argument opts))))
            (manifests     (filter-map (match-lambda
diff --git a/guix/scripts/package.scm b/guix/scripts/package.scm
index ba62d98682..5599e26f5d 100644
--- a/guix/scripts/package.scm
+++ b/guix/scripts/package.scm
@@ -223,7 +223,7 @@ non-zero relevance score."
       (($ <manifest-entry> name version output (? string? path))
        (match (find-best-packages-by-name name #f)
          ((pkg . rest)
-          (let* ((pkg               (transform store pkg))
+          (let* ((pkg               (transform pkg))
                  (candidate-version (package-version pkg)))
             (match (package-superseded pkg)
               ((? package? new)
@@ -871,7 +871,7 @@ processed, #f otherwise."
   (define transform (options->transformation opts))
 
   (define (transform-entry entry)
-    (let ((item (transform store (manifest-entry-item entry))))
+    (let ((item (transform (manifest-entry-item entry))))
       (manifest-entry-with-transformations
        (manifest-entry
          (inherit entry)
diff --git a/tests/scripts-build.scm b/tests/scripts-build.scm
index 3a49759567..d56e02b452 100644
--- a/tests/scripts-build.scm
+++ b/tests/scripts-build.scm
@@ -19,6 +19,7 @@
 (define-module (test-scripts-build)
   #:use-module (guix tests)
   #:use-module (guix store)
+  #:use-module ((guix gexp) #:select (lower-object))
   #:use-module (guix derivations)
   #:use-module (guix packages)
   #:use-module (guix git-download)
@@ -42,8 +43,7 @@
 (test-assert "options->transformation, no transformations"
   (let ((p (dummy-package "foo"))
         (t (options->transformation '())))
-    (with-store store
-      (eq? (t store p) p))))
+    (eq? (t p) p)))
 
 (test-assert "options->transformation, with-source"
   ;; Our pseudo-package is called 'guix.scm' so the 'guix.scm' source should
@@ -52,9 +52,11 @@
          (s (search-path %load-path "guix.scm"))
          (t (options->transformation `((with-source . ,s)))))
     (with-store store
-      (let ((new (t store p)))
+      (let* ((new (t p))
+             (source (run-with-store store
+                       (lower-object (package-source new)))))
         (and (not (eq? new p))
-             (string=? (package-source new)
+             (string=? source
                        (add-to-store store "guix.scm" #t
                                      "sha256" s)))))))
 
@@ -64,12 +66,9 @@
   (let* ((p (dummy-package "guix.scm" (replacement coreutils)))
          (s (search-path %load-path "guix.scm"))
          (t (options->transformation `((with-source . ,s)))))
-    (with-store store
-      (let ((new (t store p)))
-        (and (not (eq? new p))
-             (string=? (package-source new)
-                       (add-to-store store "guix.scm" #t "sha256" s))
-             (not (package-replacement new)))))))
+    (let ((new (t p)))
+      (and (not (eq? new p))
+           (not (package-replacement new))))))
 
 (test-assert "options->transformation, with-source, with version"
   ;; Our pseudo-package is called 'guix.scm' so the 'guix.scm-2.0' source
@@ -82,11 +81,13 @@
               (t (options->transformation `((with-source . ,f)))))
          (copy-file s f)
          (with-store store
-           (let ((new (t store p)))
+           (let* ((new (t p))
+                  (source (run-with-store store
+                            (lower-object (package-source new)))))
              (and (not (eq? new p))
                   (string=? (package-name new) (package-name p))
                   (string=? (package-version new) "42.0")
-                  (string=? (package-source new)
+                  (string=? source
                             (add-to-store store (basename f) #t
                                           "sha256" f))))))))))
 
@@ -95,13 +96,12 @@
   (let* ((p (dummy-package "foobar"))
          (s (search-path %load-path "guix.scm"))
          (t (options->transformation `((with-source . ,s)))))
-    (with-store store
-      (let* ((port (open-output-string))
-             (new  (parameterize ((guix-warning-port port))
-                     (t store p))))
-        (and (eq? new p)
-             (string-contains (get-output-string port)
-                              "had no effect"))))))
+    (let* ((port (open-output-string))
+           (new  (parameterize ((guix-warning-port port))
+                   (t p))))
+      (and (eq? new p)
+           (string-contains (get-output-string port)
+                            "had no effect")))))
 
 (test-assert "options->transformation, with-source, PKG=URI"
   (let* ((p (dummy-package "foo"))
@@ -109,12 +109,14 @@
          (f (string-append "foo=" s))
          (t (options->transformation `((with-source . ,f)))))
     (with-store store
-      (let ((new (t store p)))
+      (let* ((new (t p))
+             (source (run-with-store store
+                       (lower-object (package-source new)))))
         (and (not (eq? new p))
              (string=? (package-name new) (package-name p))
              (string=? (package-version new)
                        (package-version p))
-             (string=? (package-source new)
+             (string=? source
                        (add-to-store store (basename s) #t
                                      "sha256" s)))))))
 
@@ -124,11 +126,13 @@
          (f (string-append "foo@42.0=" s))
          (t (options->transformation `((with-source . ,f)))))
     (with-store store
-      (let ((new (t store p)))
+      (let* ((new (t p))
+             (source (run-with-store store
+                       (lower-object (package-source new)))))
         (and (not (eq? new p))
              (string=? (package-name new) (package-name p))
              (string=? (package-version new) "42.0")
-             (string=? (package-source new)
+             (string=? source
                        (add-to-store store (basename s) #t
                                      "sha256" s)))))))
 
@@ -140,20 +144,19 @@
                                   (native-inputs `(("x" ,grep)))))))))
          (t (options->transformation '((with-input . "coreutils=busybox")
                                        (with-input . "grep=findutils")))))
-    (with-store store
-      (let ((new (t store p)))
-        (and (not (eq? new p))
-             (match (package-inputs new)
-               ((("foo" dep1) ("bar" dep2) ("baz" dep3))
-                (and (string=? (package-full-name dep1)
-                               (package-full-name busybox))
-                     (string=? (package-full-name dep2)
-                               (package-full-name findutils))
-                     (string=? (package-name dep3) "chbouib")
-                     (match (package-native-inputs dep3)
-                       ((("x" dep))
-                        (string=? (package-full-name dep)
-                                  (package-full-name findutils))))))))))))
+    (let ((new (t p)))
+      (and (not (eq? new p))
+           (match (package-inputs new)
+             ((("foo" dep1) ("bar" dep2) ("baz" dep3))
+              (and (string=? (package-full-name dep1)
+                             (package-full-name busybox))
+                   (string=? (package-full-name dep2)
+                             (package-full-name findutils))
+                   (string=? (package-name dep3) "chbouib")
+                   (match (package-native-inputs dep3)
+                     ((("x" dep))
+                      (string=? (package-full-name dep)
+                                (package-full-name findutils)))))))))))
 
 (test-assert "options->transformation, with-graft"
   (let* ((p (dummy-package "guix.scm"
@@ -161,23 +164,22 @@
                         ("bar" ,(dummy-package "chbouib"
                                   (native-inputs `(("x" ,grep)))))))))
          (t (options->transformation '((with-graft . "grep=findutils")))))
-    (with-store store
-      (let ((new (t store p)))
-        (and (not (eq? new p))
-             (match (package-inputs new)
-               ((("foo" dep1) ("bar" dep2))
-                (and (string=? (package-full-name dep1)
-                               (package-full-name grep))
-                     (string=? (package-full-name (package-replacement dep1))
-                               (package-full-name findutils))
-                     (string=? (package-name dep2) "chbouib")
-                     (match (package-native-inputs dep2)
-                       ((("x" dep))
-                        (with-store store
-                          (string=? (derivation-file-name
-                                     (package-derivation store findutils))
-                                    (derivation-file-name
-                                     (package-derivation store dep))))))))))))))
+    (let ((new (t p)))
+      (and (not (eq? new p))
+           (match (package-inputs new)
+             ((("foo" dep1) ("bar" dep2))
+              (and (string=? (package-full-name dep1)
+                             (package-full-name grep))
+                   (string=? (package-full-name (package-replacement dep1))
+                             (package-full-name findutils))
+                   (string=? (package-name dep2) "chbouib")
+                   (match (package-native-inputs dep2)
+                     ((("x" dep))
+                      (with-store store
+                        (string=? (derivation-file-name
+                                   (package-derivation store findutils))
+                                  (derivation-file-name
+                                   (package-derivation store dep)))))))))))))
 
 (test-equal "options->transformation, with-branch"
   (git-checkout (url "https://example.org")
@@ -193,15 +195,14 @@
                                                   (commit "cabba9e")))
                                             (sha256 #f)))))))))
          (t (options->transformation '((with-branch . "chbouib=devel")))))
-    (with-store store
-      (let ((new (t store p)))
-        (and (not (eq? new p))
-             (match (package-inputs new)
-               ((("foo" dep1) ("bar" dep2))
-                (and (string=? (package-full-name dep1)
-                               (package-full-name grep))
-                     (string=? (package-name dep2) "chbouib")
-                     (package-source dep2)))))))))
+    (let ((new (t p)))
+      (and (not (eq? new p))
+           (match (package-inputs new)
+             ((("foo" dep1) ("bar" dep2))
+              (and (string=? (package-full-name dep1)
+                             (package-full-name grep))
+                   (string=? (package-name dep2) "chbouib")
+                   (package-source dep2))))))))
 
 (test-equal "options->transformation, with-commit"
   (git-checkout (url "https://example.org")
@@ -217,15 +218,14 @@
                                                   (commit "cabba9e")))
                                             (sha256 #f)))))))))
          (t (options->transformation '((with-commit . "chbouib=abcdef")))))
-    (with-store store
-      (let ((new (t store p)))
-        (and (not (eq? new p))
-             (match (package-inputs new)
-               ((("foo" dep1) ("bar" dep2))
-                (and (string=? (package-full-name dep1)
-                               (package-full-name grep))
-                     (string=? (package-name dep2) "chbouib")
-                     (package-source dep2)))))))))
+    (let ((new (t p)))
+      (and (not (eq? new p))
+           (match (package-inputs new)
+             ((("foo" dep1) ("bar" dep2))
+              (and (string=? (package-full-name dep1)
+                             (package-full-name grep))
+                   (string=? (package-name dep2) "chbouib")
+                   (package-source dep2))))))))
 
 (test-equal "options->transformation, with-git-url"
   (let ((source (git-checkout (url "https://example.org")
@@ -236,17 +236,16 @@
                         ("bar" ,(dummy-package "chbouib"
                                   (native-inputs `(("x" ,grep)))))))))
          (t (options->transformation '((with-git-url . "grep=https://example.org")))))
-    (with-store store
-      (let ((new (t store p)))
-        (and (not (eq? new p))
-             (match (package-inputs new)
-               ((("foo" dep1) ("bar" dep2))
-                (and (string=? (package-full-name dep1)
-                               (package-full-name grep))
-                     (string=? (package-name dep2) "chbouib")
-                     (match (package-native-inputs dep2)
-                       ((("x" dep3))
-                        (map package-source (list dep1 dep3))))))))))))
+    (let ((new (t p)))
+      (and (not (eq? new p))
+           (match (package-inputs new)
+             ((("foo" dep1) ("bar" dep2))
+              (and (string=? (package-full-name dep1)
+                             (package-full-name grep))
+                   (string=? (package-name dep2) "chbouib")
+                   (match (package-native-inputs dep2)
+                     ((("x" dep3))
+                      (map package-source (list dep1 dep3)))))))))))
 
 (test-equal "options->transformation, with-git-url + with-branch"
   ;; Combine the two options and make sure the 'with-branch' transformation
@@ -263,16 +262,15 @@
              (reverse '((with-git-url
                          . "grep=https://example.org")
                         (with-branch . "grep=BRANCH"))))))
-    (with-store store
-      (let ((new (t store p)))
-        (and (not (eq? new p))
-             (match (package-inputs new)
-               ((("foo" dep1) ("bar" dep2))
-                (and (string=? (package-name dep1) "grep")
-                     (string=? (package-name dep2) "chbouib")
-                     (match (package-native-inputs dep2)
-                       ((("x" dep3))
-                        (map package-source (list dep1 dep3))))))))))))
+    (let ((new (t p)))
+      (and (not (eq? new p))
+           (match (package-inputs new)
+             ((("foo" dep1) ("bar" dep2))
+              (and (string=? (package-name dep1) "grep")
+                   (string=? (package-name dep2) "chbouib")
+                   (match (package-native-inputs dep2)
+                     ((("x" dep3))
+                      (map package-source (list dep1 dep3)))))))))))
 
 (define* (depends-on-toolchain? p #:optional (toolchain "gcc-toolchain"))
   "Return true if P depends on TOOLCHAIN instead of the default tool chain."
@@ -302,21 +300,20 @@
     ;; Here we check that the transformation applies to DEP0 and all its
     ;; dependents: DEP0 must use GCC-TOOLCHAIN, DEP1 must use GCC-TOOLCHAIN
     ;; and the DEP0 that uses GCC-TOOLCHAIN, and so on.
-    (with-store store
-      (let ((new (t store p)))
-        (and (depends-on-toolchain? new "gcc-toolchain")
-             (match (bag-build-inputs (package->bag new))
-               ((("foo" dep0) ("bar" dep1) _ ...)
-                (and (depends-on-toolchain? dep1 "gcc-toolchain")
-                     (not (depends-on-toolchain? dep0 "gcc-toolchain"))
-                     (string=? (package-full-name dep0)
-                               (package-full-name grep))
-                     (match (bag-build-inputs (package->bag dep1))
-                       ((("x" dep) _ ...)
-                        (and (depends-on-toolchain? dep "gcc-toolchain")
-                             (match (bag-build-inputs (package->bag dep))
-                               ((("y" dep) _ ...) ;this one is unchanged
-                                (eq? dep grep))))))))))))))
+    (let ((new (t p)))
+      (and (depends-on-toolchain? new "gcc-toolchain")
+           (match (bag-build-inputs (package->bag new))
+             ((("foo" dep0) ("bar" dep1) _ ...)
+              (and (depends-on-toolchain? dep1 "gcc-toolchain")
+                   (not (depends-on-toolchain? dep0 "gcc-toolchain"))
+                   (string=? (package-full-name dep0)
+                             (package-full-name grep))
+                   (match (bag-build-inputs (package->bag dep1))
+                     ((("x" dep) _ ...)
+                      (and (depends-on-toolchain? dep "gcc-toolchain")
+                           (match (bag-build-inputs (package->bag dep))
+                             ((("y" dep) _ ...)   ;this one is unchanged
+                              (eq? dep grep)))))))))))))
 
 (test-equal "options->transformation, with-c-toolchain twice"
   (package-full-name grep)
@@ -330,23 +327,21 @@
          (t    (options->transformation
                 '((with-c-toolchain . "chbouib=clang-toolchain")
                   (with-c-toolchain . "stuff=clang-toolchain")))))
-    (with-store store
-      (let ((new (t store p)))
-        (and (depends-on-toolchain? new "clang-toolchain")
-             (match (bag-build-inputs (package->bag new))
-               ((("foo" dep0) ("bar" dep1) ("baz" dep2) _ ...)
-                (and (depends-on-toolchain? dep0 "clang-toolchain")
-                     (depends-on-toolchain? dep1 "clang-toolchain")
-                     (not (depends-on-toolchain? dep2 "clang-toolchain"))
-                     (package-full-name dep2)))))))))
+    (let ((new (t p)))
+      (and (depends-on-toolchain? new "clang-toolchain")
+           (match (bag-build-inputs (package->bag new))
+             ((("foo" dep0) ("bar" dep1) ("baz" dep2) _ ...)
+              (and (depends-on-toolchain? dep0 "clang-toolchain")
+                   (depends-on-toolchain? dep1 "clang-toolchain")
+                   (not (depends-on-toolchain? dep2 "clang-toolchain"))
+                   (package-full-name dep2))))))))
 
 (test-assert "options->transformation, with-c-toolchain, no effect"
   (let ((p (dummy-package "thingie"))
         (t (options->transformation
             '((with-c-toolchain . "does-not-exist=gcc-toolchain")))))
     ;; When it has no effect, '--with-c-toolchain' returns P.
-    (with-store store
-      (eq? (t store p) p))))
+    (eq? (t p) p)))
 
 (test-equal "options->transformation, with-debug-info"
   '(#:strip-binaries? #f)
@@ -357,13 +352,12 @@
                            ("bar" ,grep)))))
          (t    (options->transformation
                 '((with-debug-info . "chbouib")))))
-    (with-store store
-      (let ((new (t store p)))
-        (match (package-inputs new)
-          ((("foo" dep0) ("bar" dep1))
-           (and (string=? (package-full-name dep1)
-                          (package-full-name grep))
-                (package-arguments (package-replacement dep0)))))))))
+    (let ((new (t p)))
+      (match (package-inputs new)
+        ((("foo" dep0) ("bar" dep1))
+         (and (string=? (package-full-name dep1)
+                        (package-full-name grep))
+              (package-arguments (package-replacement dep0))))))))
 
 (test-assert "options->transformation, without-tests"
   (let* ((dep (dummy-package "dep"))
@@ -371,14 +365,13 @@
                 (inputs `(("dep" ,dep)))))
          (t   (options->transformation '((without-tests . "dep")
                                          (without-tests . "tar")))))
-    (with-store store
-      (let ((new (t store p)))
-        (match (bag-direct-inputs (package->bag new))
-          ((("dep" dep) ("tar" tar) _ ...)
-           ;; TODO: Check whether TAR has #:tests? #f when transformations
-           ;; apply to implicit inputs.
-           (equal? (package-arguments dep)
-                   '(#:tests? #f))))))))
+    (let ((new (t p)))
+      (match (bag-direct-inputs (package->bag new))
+        ((("dep" dep) ("tar" tar) _ ...)
+         ;; TODO: Check whether TAR has #:tests? #f when transformations
+         ;; apply to implicit inputs.
+         (equal? (package-arguments dep)
+                 '(#:tests? #f)))))))
 
 (test-end)
 
