diff --git a/GNUmakefile.in b/GNUmakefile.in
index c1685fd..44f65dd 100644
--- a/GNUmakefile.in
+++ b/GNUmakefile.in
@@ -3,6 +3,7 @@ bindir = @bindir@
 datarootdir = @datarootdir@
 mandir = @mandir@
 man1dir = $(mandir)/man1
+baseshell = @baseshell@
 
 tests = $(testdir)/*.t
 
@@ -47,7 +48,7 @@ fake: fake.tmp
 	install -m 755 $< $@
 
 fake.tmp: $(srcdir)/fake.in
-	sed -e 's:@basexy''@:$(basexy):' < $< > $@
+	sed -e 's:@basexy''@:$(basexy):' -e 's:@baseshell''@:$(baseshell):' < $< > $@
 
 fake.1: $(smandir)/fake.1.in
 	cp $< $@
diff --git a/configure b/configure
index 112feae..458f737 100755
--- a/configure
+++ b/configure
@@ -44,6 +44,7 @@ populate() # {{{
     -e "s@datarootdir@$datarootdirg" \
     -e "s@mandir@$mandirg" \
     -e "s@basexy@$basexyg" \
+    -e "s@baseshell@$baseshellg" \
     $1 \
   > $2
 } # }}}
@@ -58,9 +59,11 @@ bindir='$(prefix)/bin'
 datarootdir='$(prefix)/share'
 mandir='$(datarootdir)/man'
 mandir_set=0
+baseshell=/bin/sh
 
 for a in "$@"; do
   case $a in
+  --baseshell=*)    baseshell="${a#*=}"   ;;
   --bindir=*)       bindir="${a#*=}"      ;;
   --datarootdir=*)  datarootdir="${a#*=}" ;;
   --mandir=*)
@@ -68,7 +71,7 @@ for a in "$@"; do
     mandir_set=1
   ;;
   --prefix=*)       prefix="${a#*=}"      ;;
-  --with-basexy=*)  basexy="${a#*=}"       ;;
+  --with-basexy=*)  basexy="${a#*=}"      ;;
   esac
 done
 
diff --git a/s/fake.in b/s/fake.in
index 6a874ea..d6c3623 100644
--- a/s/fake.in
+++ b/s/fake.in
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!@baseshell@
 # vim: sw=2 sts=2 et fdm=marker cms=\ #\ %s
 
 set -e
@@ -270,14 +270,14 @@ impl_has_body() # {{{
 impl_passthrough() # {{{
 {
   sed 's/^ *//' > "${1:?}" <<\EOF
-  #!/bin/sh
+  #!@baseshell@
   exec "$ARGV0" "$@"
 EOF
 } # }}}
 impl_transparent() # {{{
 {
   sed 's/^ *//' > "${1:?}" <<\EOF
-  #!/bin/sh
+  #!@baseshell@
   argv0=$(command -v "$ARGV0")
   export PATH="$FAKE_BINDIR${PATH+:$PATH}"
   exec "$argv0" "$@"
@@ -286,7 +286,7 @@ EOF
 impl_has_errout() # {{{
 {
   {
-    printf -- "%s\n" "#!/bin/sh"
+    printf -- "%s\n" "#!@baseshell@"
     printf -- "%s\n" "cat >&${1:?} <<\\EOF"
     cat
     printf -- "%s\n" "EOF"
@@ -295,7 +295,7 @@ impl_has_errout() # {{{
 impl_reflect() # {{{
 {
   sed 's/^ *//' > "${1:?}" <<\EOF
-  #!/bin/sh
+  #!@baseshell@
   exec >&2
   printf "%s" "${ARGV0##*/}"
   test $# -eq 0 || printf " %s" "$*"
@@ -305,7 +305,7 @@ EOF
 impl_default() # {{{
 {
   {
-    printf -- "%s\n" "#!/bin/sh"
+    printf -- "%s\n" "#!@baseshell@"
   } > "${1:?}"
 } # }}}
 
@@ -330,7 +330,7 @@ test -z "$exitcode" || printf -- >> "$name" "exit %s\n" "$exitcode"
 chmod +x "$name"
 
 {
-  printf '#!/bin/sh\n\n'
+  printf '#!@baseshell@\n\n'
   sed -n '/^#### SHARED {{{/,/### SHARED }}}/p' < "$0"
   sed -n '/^#### BEGIN FRONTEND$/,$p' < "$0" |
   sed \
diff --git a/t/argv-0-files.t b/t/argv-0-files.t
index 450e4dc..19ff2ae 100644
--- a/t/argv-0-files.t
+++ b/t/argv-0-files.t
@@ -17,4 +17,4 @@ test::
   $ test -x $FAKE_BINDIR/.fubar/0-
 
   $ cat $FAKE_BINDIR/.fubar/0-
-  #!/bin/sh
+  #!*/sh (glob)
diff --git a/t/argv-n-files.t b/t/argv-n-files.t
index 5001a45..3bb7050 100644
--- a/t/argv-n-files.t
+++ b/t/argv-n-files.t
@@ -17,4 +17,4 @@ test::
   $ test -x $FAKE_BINDIR/.fubar/2-/5KMMQRRICK======-EDQ7APJ6
 
   $ cat $FAKE_BINDIR/.fubar/2-/5KMMQRRICK======-EDQ7APJ6
-  #!/bin/sh
+  #!*/sh (glob)
diff --git a/t/body-catchall-files.t b/t/body-catchall-files.t
index ba631c1..9f1b197 100644
--- a/t/body-catchall-files.t
+++ b/t/body-catchall-files.t
@@ -20,5 +20,5 @@ test::
   $ test -f $FAKE_BINDIR/.fubar/0+
   $ test -x $FAKE_BINDIR/.fubar/0+
   $ cat $FAKE_BINDIR/.fubar/0+
-  #!/bin/sh
+  #!*/sh (glob)
   echo "hello ${1-unknown}!"
diff --git a/t/body-files.t b/t/body-files.t
index 8aa2e01..21c6b09 100644
--- a/t/body-files.t
+++ b/t/body-files.t
@@ -20,5 +20,5 @@ test::
   $ test -f $FAKE_BINDIR/.fubar/0-
   $ test -x $FAKE_BINDIR/.fubar/0-
   $ cat $FAKE_BINDIR/.fubar/0-
-  #!/bin/sh
+  #!*/sh (glob)
   echo "hello world!"
diff --git a/t/error-files.t b/t/error-files.t
index 1b10418..7decae8 100644
--- a/t/error-files.t
+++ b/t/error-files.t
@@ -19,7 +19,7 @@ test::
   $ test -f $FAKE_BINDIR/.fubar/0-
   $ test -x $FAKE_BINDIR/.fubar/0-
   $ cat $FAKE_BINDIR/.fubar/0-
-  #!/bin/sh
+  #!*/sh (glob)
   cat >&2 <<\EOF
   gloomy sunday...
   EOF
diff --git a/t/exitcode-files.t b/t/exitcode-files.t
index 287f54c..bd0b81d 100644
--- a/t/exitcode-files.t
+++ b/t/exitcode-files.t
@@ -17,5 +17,5 @@ test::
   $ test -f $FAKE_BINDIR/.fubar/0-
   $ test -x $FAKE_BINDIR/.fubar/0-
   $ cat $FAKE_BINDIR/.fubar/0-
-  #!/bin/sh
+  #!*sh (glob)
   exit 42
diff --git a/t/output-files.t b/t/output-files.t
index eb856a9..0c1be9c 100644
--- a/t/output-files.t
+++ b/t/output-files.t
@@ -19,7 +19,7 @@ test::
   $ test -f $FAKE_BINDIR/.fubar/0-
   $ test -x $FAKE_BINDIR/.fubar/0-
   $ cat $FAKE_BINDIR/.fubar/0-
-  #!/bin/sh
+  #!*/sh (glob)
   cat >&1 <<\EOF
   hello world!
   EOF