diff --git a/INSTALL.md b/INSTALL.md
index 66a51a5..9f5eafd 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -160,7 +160,7 @@ Notes
  ### Linking to an Existing BookmarkFS Utility Library
 
   If a BookmarkFS utility library is already installed, it can be
-  specified with `--with-bookmarkfs[=<pkgconfdir>]` during configuration,
+  specified with `--with-bookmarkfs-util[=<pkgconfdir>]` during configuration,
   in the same way as with other dependencies.
 
   In this case, the utility library will not be built from source,
diff --git a/Makefile.am b/Makefile.am
index 8f860fe..73d58cc 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -9,4 +9,4 @@
 ACLOCAL_AMFLAGS = -I m4
 SUBDIRS         = doc src tests
 
-pkgconfig_DATA = bookmarkfs.pc
+pkgconfig_DATA = bookmarkfs_util.pc
diff --git a/bookmarkfs.pc.in b/bookmarkfs_util.pc.in
similarity index 89%
rename from bookmarkfs.pc.in
rename to bookmarkfs_util.pc.in
index a6476bc..d27bf33 100644
--- a/bookmarkfs.pc.in
+++ b/bookmarkfs_util.pc.in
@@ -14,8 +14,8 @@ exec_prefix=@exec_prefix@
 includedir=@includedir@
 libdir=@libdir@
 
-Name: ${package}
-Description: BookmarkFS
+Name: ${package}_util
+Description: BookmarkFS Utility Library
 Version: ${version}
 URL: https://www.nongnu.org/bookmarkfs/
 Cflags: -I${includedir}
diff --git a/configure.ac b/configure.ac
index 24e5119..f21195b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,7 +9,7 @@ dnl
 
 AC_PREREQ([2.70])
 AC_INIT([bookmarkfs], [0.1.0], [bug-bookmarkfs@nongnu.org])
-AC_CONFIG_SRCDIR([bookmarkfs.pc.in])
+AC_CONFIG_SRCDIR([bookmarkfs_util.pc.in])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_TESTDIR([tests])
@@ -120,7 +120,7 @@ EX_FEAT([fsck-handler-tcl], [no], [Tcl-based fsck handler])
 
 AX_PTHREAD
 
-EX_DEP([bookmarkfs], [>= 0.1], [BookmarkFS utility library], [
+EX_DEP([bookmarkfs_util], [>= 0.1], [BookmarkFS utility library], [
     AS_VAR_SET([enable_bookmarkfs_util], [no])
 ])
 
@@ -219,6 +219,6 @@ AC_CONFIG_FILES([
     doc/Makefile
     src/Makefile
     tests/Makefile tests/atlocal
-    bookmarkfs.pc
+    bookmarkfs_util.pc
 ])
 AC_OUTPUT
diff --git a/m4/configure_ext.m4 b/m4/configure_ext.m4
index 504337c..db585d4 100644
--- a/m4/configure_ext.m4
+++ b/m4/configure_ext.m4
@@ -42,19 +42,18 @@ dnl  Check whether a package exists with `pkg-config`,
 dnl  and provide an option to specify the package's custom install location.
 dnl
 AC_DEFUN([EX_DEP], [
-    m4_pushdef([with_var_], [with_]m4_translit([$1], [-], [_]))
     AC_ARG_WITH([$1], m4_normalize([
-        AS_HELP_STRING([--with-$1[[=PKGCONFIGDIR]]],
+        AS_HELP_STRING([--with-m4_translit([$1], [_], [-])[[=PKGCONFIGDIR]]],
                 [pkg-config search path for $3])
     ]), , [
-        AS_VAR_SET([with_var_], [no])
+        AS_VAR_SET([with_$1], [no])
         m4_foreach([feat_name_], [m4_shiftn(4, $@)], [
             AS_VAR_IF([enable_]m4_translit(feat_name_, [-], [_]), [yes], [
-                AS_VAR_SET([with_var_], [yes])
+                AS_VAR_SET([with_$1], [yes])
             ])
         ])
     ])
-    AS_VAR_IF([with_var_], [no], [
+    AS_VAR_IF([with_$1], [no], [
         m4_foreach([feat_name_], [m4_shiftn(4, $@)], [
             AS_VAR_IF([enable_]m4_translit(feat_name_, [-], [_]), [yes], [
                 AC_MSG_ERROR(m4_normalize([
@@ -65,14 +64,13 @@ AC_DEFUN([EX_DEP], [
         ])
     ], [
         AS_VAR_SET([old_pkg_config_path_], ["${PKG_CONFIG_PATH}"])
-        AS_VAR_IF([with_var_], [yes], , [
-            AS_VAR_SET([PKG_CONFIG_PATH], ["${with_var_}:${PKG_CONFIG_PATH}"])
+        AS_VAR_IF([with_$1], [yes], , [
+            AS_VAR_SET([PKG_CONFIG_PATH], ["${with_$1}:${PKG_CONFIG_PATH}"])
             export PKG_CONFIG_PATH
         ])
         PKG_CHECK_MODULES(m4_toupper([$1]), [$1 $2], [$4])
         AS_VAR_SET([PKG_CONFIG_PATH], ["${old_pkg_config_path_}"])
     ])
-    m4_popdef([with_var_])
 ])
 
 dnl