diff -Nur libtool-2.5.4.orig/configure libtool-2.5.4/configure
--- libtool-2.5.4.orig/configure	2025-06-10 08:17:21.269872200 +0200
+++ libtool-2.5.4/configure	2025-06-10 08:18:07.824248200 +0200
@@ -13566,7 +13566,7 @@
     case $host_os in
     cygwin*)
       # Cygwin DLLs use 'cyg' prefix rather than 'lib'
-      soname_spec='`echo $libname | $SED -e 's/^lib/cyg/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+      soname_spec='`echo $libname | $SED -e 's/^lib/msys-/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
 
       sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/lib/w32api"
       ;;
@@ -19822,7 +19822,7 @@
     case $host_os in
     cygwin*)
       # Cygwin DLLs use 'cyg' prefix rather than 'lib'
-      soname_spec='`echo $libname | $SED -e 's/^lib/cyg/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+      soname_spec='`echo $libname | $SED -e 's/^lib/msys-/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
 
       ;;
     mingw* | windows* | cegcc*)
@@ -23635,7 +23635,7 @@
     case $host_os in
     cygwin*)
       # Cygwin DLLs use 'cyg' prefix rather than 'lib'
-      soname_spec='`echo $libname | $SED -e 's/^lib/cyg/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+      soname_spec='`echo $libname | $SED -e 's/^lib/msys-/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
 
       ;;
     mingw* | windows* | cegcc*)
@@ -27600,7 +27600,7 @@
     case $host_os in
     cygwin*)
       # Cygwin DLLs use 'cyg' prefix rather than 'lib'
-      soname_spec='`echo $libname | $SED -e 's/^lib/cyg/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+      soname_spec='`echo $libname | $SED -e 's/^lib/msys-/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
 
       ;;
     mingw* | windows* | cegcc*)
diff -Nur libtool-2.5.4.orig/libltdl/configure libtool-2.5.4/libltdl/configure
--- libtool-2.5.4.orig/libltdl/configure	2025-06-10 08:17:21.237899700 +0200
+++ libtool-2.5.4/libltdl/configure	2025-06-10 08:18:14.340828300 +0200
@@ -12001,7 +12001,7 @@
     case $host_os in
     cygwin*)
       # Cygwin DLLs use 'cyg' prefix rather than 'lib'
-      soname_spec='`echo $libname | $SED -e 's/^lib/cyg/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
+      soname_spec='`echo $libname | $SED -e 's/^lib/msys-/'``echo $release | $SED -e 's/[.]/-/g'`$versuffix$shared_ext'
 
       sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/lib/w32api"
       ;;
diff -Nur libtool-2.5.4.orig/m4/libtool.m4 libtool-2.5.4/m4/libtool.m4
--- libtool-2.5.4.orig/m4/libtool.m4	2025-06-10 08:17:21.269872200 +0200
+++ libtool-2.5.4/m4/libtool.m4	2025-06-10 08:17:49.112292900 +0200
@@ -2612,7 +2612,7 @@
     case $host_os in
     cygwin*)
       # Cygwin DLLs use 'cyg' prefix rather than 'lib'
-      soname_spec='`echo $libname | $SED -e 's/^lib/cyg/'``echo $release | $SED -e 's/[[.]]/-/g'`$versuffix$shared_ext'
+      soname_spec='`echo $libname | $SED -e 's/^lib/msys-/'``echo $release | $SED -e 's/[[.]]/-/g'`$versuffix$shared_ext'
 m4_if([$1], [],[
       sys_lib_search_path_spec="$sys_lib_search_path_spec /usr/lib/w32api"])
       ;;