diff --git a/pkgs/by-name/gn/gnulib/memcpy-fix-backport-250512.patch b/pkgs/by-name/gn/gnulib/memcpy-fix-backport-250512.patch
new file mode 100644
index 000000000000..1900b618bc27
--- /dev/null
+++ b/pkgs/by-name/gn/gnulib/memcpy-fix-backport-250512.patch
@@ -0,0 +1,67 @@
+Based on https://gitweb.git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commitdiff_plain;h=c44fe03b72687c9e913727724c29bdb49c1f86e3
+
+Backported to 5c5298c4f47bf1912f6317a938df501e680f2bcb for use in packages with older gnulibs
+
+diff --git a/lib/string.in.h b/lib/string.in.h
+index e764221168..db574ca576 100644
+--- a/lib/string.in.h
++++ b/lib/string.in.h
+@@ -214,38 +214,58 @@ _GL_EXTERN_C void free (void *);
+ 
+ /* Declarations for ISO C N3322.  */
+ #if defined __GNUC__ && __GNUC__ >= 15 && !defined __clang__
++# ifndef memcpy
+ _GL_EXTERN_C void *memcpy (void *__dest, const void *__src, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
++# endif
++# ifndef memccpy
+ _GL_EXTERN_C void *memccpy (void *__dest, const void *__src, int __c, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 4)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 4);
++# endif
++# ifndef memmove
+ _GL_EXTERN_C void *memmove (void *__dest, const void *__src, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
++# endif
++# ifndef strncpy
+ _GL_EXTERN_C char *strncpy (char *__dest, const char *__src, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
++# endif
++# ifndef strndup
+ _GL_EXTERN_C char *strndup (const char *__s, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 2);
++# endif
++# ifndef strncat
+ _GL_EXTERN_C char *strncat (char *__dest, const char *__src, size_t __n)
+   _GL_ARG_NONNULL ((1)) _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
++# endif
++# ifndef memcmp
+ _GL_EXTERN_C int memcmp (const void *__s1, const void *__s2, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
++# endif
++# ifndef strncmp
+ _GL_EXTERN_C int strncmp (const char *__s1, const char *__s2, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+-# ifndef __cplusplus
++# endif
++# if !defined memchr && !defined __cplusplus
+ _GL_EXTERN_C void *memchr (const void *__s, int __c, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
+ _GL_EXTERN_C void *memrchr (const void *__s, int __c, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
+ # endif
++# ifndef memset
+ _GL_EXTERN_C void *memset (void *__s, int __c, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
++# endif
++# ifndef memset_explicit
+ _GL_EXTERN_C void *memset_explicit (void *__s, int __c, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
++# endif
+ #endif
+ 
\ No newline at end of file
diff --git a/pkgs/by-name/gn/gnulib/memcpy-fix.patch b/pkgs/by-name/gn/gnulib/memcpy-fix.patch
new file mode 100644
index 000000000000..8584a773982a
--- /dev/null
+++ b/pkgs/by-name/gn/gnulib/memcpy-fix.patch
@@ -0,0 +1,107 @@
+Based on https://gitweb.git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commitdiff_plain;h=c44fe03b72687c9e913727724c29bdb49c1f86e3
+
+--- a/lib/string.in.h
++++ b/lib/string.in.h
+@@ -214,63 +214,83 @@
+ 
+ /* Declarations for ISO C N3322.  */
+ #if defined __GNUC__ && __GNUC__ >= 15 && !defined __clang__
++# ifndef memcpy
+ _GL_EXTERN_C void *memcpy (void *__dest, const void *__src, size_t __n)
+-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
++#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+   _GL_ATTRIBUTE_NOTHROW
+-# endif
++#  endif
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
++# endif
++# ifndef memccpy
+ _GL_EXTERN_C void *memccpy (void *__dest, const void *__src, int __c, size_t __n)
+-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
++#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+   _GL_ATTRIBUTE_NOTHROW
+-# endif
++#  endif
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 4)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 4);
++# endif
++# ifndef memmove
+ _GL_EXTERN_C void *memmove (void *__dest, const void *__src, size_t __n)
+-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
++#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+   _GL_ATTRIBUTE_NOTHROW
+-# endif
++#  endif
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
++# endif
++# ifndef strncpy
+ _GL_EXTERN_C char *strncpy (char *__dest, const char *__src, size_t __n)
+-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
++#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+   _GL_ATTRIBUTE_NOTHROW
+-# endif
++#  endif
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
++# endif
++# ifndef strndup
+ _GL_EXTERN_C char *strndup (const char *__s, size_t __n)
+-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
++#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+   _GL_ATTRIBUTE_NOTHROW
+-# endif
++#  endif
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 2);
++# endif
++# ifndef strncat
+ _GL_EXTERN_C char *strncat (char *__dest, const char *__src, size_t __n)
+-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
++#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+   _GL_ATTRIBUTE_NOTHROW
+-# endif
++#  endif
+   _GL_ARG_NONNULL ((1)) _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
++# endif
++# ifndef memcmp
+ _GL_EXTERN_C int memcmp (const void *__s1, const void *__s2, size_t __n)
+-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
++#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+   _GL_ATTRIBUTE_NOTHROW
+-# endif
++#  endif
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
++# endif
++# ifndef strncmp
+ _GL_EXTERN_C int strncmp (const char *__s1, const char *__s2, size_t __n)
+-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
++#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+   _GL_ATTRIBUTE_NOTHROW
+-# endif
++#  endif
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+-# ifndef __cplusplus
++# endif
++# if !defined memchr && !defined __cplusplus
+ _GL_EXTERN_C void *memchr (const void *__s, int __c, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
+ _GL_EXTERN_C void *memrchr (const void *__s, int __c, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
+ # endif
++# ifndef memset
+ _GL_EXTERN_C void *memset (void *__s, int __c, size_t __n)
+-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
++#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+   _GL_ATTRIBUTE_NOTHROW
+-# endif
++#  endif
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
++# endif
++# ifndef memset_explicit
+ _GL_EXTERN_C void *memset_explicit (void *__s, int __c, size_t __n)
+   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
++# endif
+ #endif
diff --git a/pkgs/by-name/gn/gnulib/package.nix b/pkgs/by-name/gn/gnulib/package.nix
index c8d47e6666fc..afa89c12dd4d 100644
--- a/pkgs/by-name/gn/gnulib/package.nix
+++ b/pkgs/by-name/gn/gnulib/package.nix
@@ -34,6 +34,11 @@ stdenv.mkDerivation {
   # do not change headers to not update all vendored build files
   dontFixup = true;
 
+  passthru.patches = {
+    memcpy-fix = ./memcpy-fix.patch;
+    memcpy-fix-backport-250512 = ./memcpy-fix-backport-250512.patch;
+  };
+
   meta = {
     description = "Central location for code to be shared among GNU packages";
     homepage = "https://www.gnu.org/software/gnulib/";
diff --git a/pkgs/development/libraries/gettext/default.nix b/pkgs/development/libraries/gettext/default.nix
index 20edb670b8a0..8d1c548944fc 100644
--- a/pkgs/development/libraries/gettext/default.nix
+++ b/pkgs/development/libraries/gettext/default.nix
@@ -5,6 +5,7 @@
   libiconv,
   bashNonInteractive,
   updateAutotoolsGnuConfigScriptsHook,
+  gnulib,
 }:
 
 # Note: this package is used for bootstrapping fetchurl, and thus
@@ -69,12 +70,22 @@ stdenv.mkDerivation rec {
     substituteInPlace gettext-tools/projects/GNOME/trigger --replace "/bin/pwd" pwd
     substituteInPlace gettext-tools/src/project-id --replace "/bin/pwd" pwd
   ''
-  + lib.optionalString stdenv.hostPlatform.isCygwin ''
-    sed -i -e "s/\(cldr_plurals_LDADD = \)/\\1..\/gnulib-lib\/libxml_rpl.la /" gettext-tools/src/Makefile.in
-    sed -i -e "s/\(libgettextsrc_la_LDFLAGS = \)/\\1..\/gnulib-lib\/libxml_rpl.la /" gettext-tools/src/Makefile.in
-  ''
   + lib.optionalString stdenv.hostPlatform.isMinGW ''
     sed -i "s/@GNULIB_CLOSE@/1/" */*/unistd.in.h
+  ''
+  + lib.optionalString stdenv.hostPlatform.isCygwin ''
+    for gnulib in \
+      ./libtextstyle/lib \
+      ./gettext-tools/libgettextpo \
+      ./gettext-tools/gnulib-lib \
+      ./gettext-runtime/libasprintf/gnulib-lib \
+      ./gettext-runtime/intl/gnulib-lib \
+      ./gettext-runtime/gnulib-lib
+    do
+      cd "$gnulib"
+      patch -p2 < ${gnulib.patches.memcpy-fix}
+      cd -
+    done
   '';
 
   strictDeps = true;
@@ -85,7 +96,7 @@ stdenv.mkDerivation rec {
     lib.optionals (!stdenv.hostPlatform.isMinGW) [
       bashNonInteractive
     ]
-    ++ lib.optionals (!stdenv.hostPlatform.isLinux && !stdenv.hostPlatform.isCygwin) [
+    ++ lib.optionals (!stdenv.hostPlatform.isLinux) [
       # HACK, see #10874 (and 14664)
       libiconv
     ];