diff --git a/gzip.changes b/gzip.changes
index 70d347b..961329a 100644
--- a/gzip.changes
+++ b/gzip.changes
@@ -1,3 +1,12 @@
+-------------------------------------------------------------------
+Wed Aug 16 14:52:39 UTC 2023 - Dominique Leuenberger <dimstar@opensuse.org>
+
+- export CONFIG_SHELL=/bin/sh before running configure: results in
+  the shell script (zcat/zgrep/…) to receive a /bin/sh shebang
+  instead of requiring bash (the local shell used to build).
+- Use for i in $(seq 1 9) instead of bashism for in in {1..9}, and
+  drop buildshell definition to require bash.
+
 -------------------------------------------------------------------
 Tue Dec 27 12:26:05 UTC 2022 - Ludwig Nussel <lnussel@suse.com>
 
diff --git a/gzip.spec b/gzip.spec
index a09021f..5efa5a9 100644
--- a/gzip.spec
+++ b/gzip.spec
@@ -16,7 +16,6 @@
 #
 
 
-%define _buildshell /bin/bash
 Name:           gzip
 Version:        1.12
 Release:        0
@@ -70,6 +69,7 @@ export CFLAGS="$CFLAGS -DDFLTCC_LEVEL_MASK=0x7e"
 # Avoid text relocations on i386 as the assembler code (in
 # lib/match.c) is not prepared for PIE (bsc#1143125).
 export DEFS=NO_ASM
+export CONFIG_SHELL=/bin/sh
 %configure --disable-silent-rules \
   gl_cv_func_printf_directive_n=yes \
   gl_cv_func_printf_infinite_long_double=yes \
@@ -95,7 +95,7 @@ profile_gzip
 %endif
 
 %check
-for i in {1..9}; do
+for i in $(seq 1 9); do
   for f in build-aux/texinfo.tex /bin/bash; do
     basef=${f##*/}
     time ./gzip -$i < $f > $basef.gz