diff --git a/gnu/packages/javascript.scm b/gnu/packages/javascript.scm
index 158abaded7..d8ebee3c3f 100644
--- a/gnu/packages/javascript.scm
+++ b/gnu/packages/javascript.scm
@@ -27,24 +27,22 @@ (define-module (gnu packages javascript)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (gnu packages)
   #:use-module (gnu packages base)
+  #:use-module (gnu packages bash)
   #:use-module (gnu packages compression)
+  #:use-module (gnu packages java)
   #:use-module (gnu packages node)
   #:use-module (gnu packages readline)
   #:use-module (gnu packages uglifyjs)
   #:use-module (gnu packages web)
-  #:use-module (gnu packages java)
-  #:use-module (gnu packages bash)
-  #:use-module (gnu packages perl)
   #:use-module (guix packages)
   #:use-module (guix download)
   #:use-module (guix git-download)
-  #:use-module (guix build-system gnu)
+  #:use-module (guix build-system ant)
   #:use-module (guix build-system cmake)
-  #:use-module (guix build-system trivial)
+  #:use-module (guix build-system gnu)
   #:use-module (guix build-system minify)
-  #:use-module (guix build-system ant)
-  #:use-module (guix utils)
-  #:use-module (guix gexp))
+  #:use-module (guix build-system trivial)
+  #:use-module (guix utils))
 
 (define-public cjson
   (package
@@ -796,16 +794,14 @@ (define-public duktape
     (license license:expat)))
 
 (define-public rhino
-  (let* ((rel-ver "1.7.7.2")
-         (commit "935942527ff434b205e797df4185518e5369466e"))
     (package
       (name "rhino")
-      (version rel-ver)
+      (version "1.7.7.2")
       (source (origin
                 (method git-fetch)
                 (uri (git-reference
                       (url "https://github.com/mozilla/rhino.git")
-                      (commit commit)))
+                      (commit "935942527ff434b205e797df4185518e5369466e")))
                 (file-name (git-file-name name version))
                 (sha256
                  (base32
@@ -813,17 +809,14 @@ (define-public rhino
                 (modules '((guix build utils)))
                 (snippet '(begin
                             ;; Remove benchmark testing
-                            (with-directory-excursion
-                                "testsrc"
-                              (delete-file-recursively "benchmarks"))
-                            (with-directory-excursion
-                             "testsrc/org/mozilla/javascript"
-                             (delete-file-recursively "benchmarks"))
+                            (delete-file-recursively "testsrc/benchmarks")
+                            (delete-file-recursively
+                             "testsrc/org/mozilla/javascript/benchmarks")
                             ;; Identify bundled jars
                             (format #t "~%~a~%" "Sourced jars")
                             (for-each (lambda (f)
                                         (format #t "~/~a~%" f))
-                                      (find-files "." ".*\\.jar$"))))))
+                                      (find-files "." "\\.jar$"))))))
       (build-system ant-build-system)
       (inputs (list bash-minimal))
       (native-inputs (list java-junit java-hamcrest-core java-snakeyaml))
@@ -848,7 +841,8 @@ (define-public rhino
                         (string-append "<!-- " all " -->"))
                        (("<pathelement location=\"\\$\\{jsr173.jar\\}\" */>" all)
                         (string-append "<!-- " all " -->"))
-                       (("<pathelement path=\"\\$\\{coverage.classes.dir\\}\" */>" all)
+                       (("<pathelement path=\"\\$\\{coverage.classes.dir\\}\" */>"
+                         all)
                         (string-append "<!-- " all " -->"))
                        (("<pathelement path=\"lib/emma.jar\"/>" all)
                         (string-append "<!-- " all " -->"))
@@ -862,7 +856,8 @@ (define-public rhino
                         (string-append "<fileset dir=\"" snakeyaml-lib
                          "\" includes=\"**/*.jar\"/>"))
                        ;; Disabling instrumentation.
-                       (("(<target name=\"junit\" depends=\"junit-compile),.*" all pre)
+                       (("(<target name=\"junit\" depends=\"junit-compile),.*"
+                         all pre)
                         (string-append pre "\">"))))
                    (invoke "ant" "junit")))))
            (replace 'install
@@ -873,8 +868,7 @@ (define-public rhino
                                (rhino (string-append bin "/rhino"))
                                (man (string-append out "/share/man/man1")))
                           (mkdir-p bin)
-                          (with-directory-excursion "man"
-                            (install-file "rhino.1" man))
+                          (install-file "man/rhino.1" man)
                           (install-file (string-append "build/" pkg+ver
                                                        "/js.jar")
                                         (string-append out "/share/java"))
@@ -889,6 +883,6 @@ (define-public rhino
       (synopsis "Javascript implemented in Java")
       (description
        "Rhino implements ECMAScript, also known as JavaScript, in Java as
-specified in the fifth edition of ECMA-262")
-      (license license:mpl2.0))))
+specified in the fifth edition of ECMA-262.")
+      (license license:mpl2.0)))
 
