diff --git a/external/harfbuzz/UnpackedTarball_harfbuzz.mk b/external/harfbuzz/UnpackedTarball_harfbuzz.mk
index 9a771dffe279..6de80f0ea415 100644
--- a/external/harfbuzz/UnpackedTarball_harfbuzz.mk
+++ b/external/harfbuzz/UnpackedTarball_harfbuzz.mk
@@ -17,12 +17,7 @@ $(eval $(call gb_UnpackedTarball_set_patchlevel,harfbuzz,0))
 
 $(eval $(call gb_UnpackedTarball_add_patches,harfbuzz, \
     external/harfbuzz/tdf159529.patch.0 \
-))
-
-ifneq ($(filter-out MACOSX WNT,$(OS)),)
-$(eval $(call gb_UnpackedTarball_add_patches,harfbuzz, \
     external/harfbuzz/icu_75.patch.0 \
 ))
-endif
 
 # vim: set noet sw=4 ts=4:
diff --git a/external/harfbuzz/icu_75.patch.0 b/external/harfbuzz/icu_75.patch.0
index 4323716caa27..9b14433211b0 100644
--- a/external/harfbuzz/icu_75.patch.0
+++ b/external/harfbuzz/icu_75.patch.0
@@ -1,17 +1,88 @@
---- configure.ac	2024-06-12 16:35:18.736933604 +0200
-+++ configure.ac	2024-06-12 16:57:39.544214075 +0200
-@@ -249,7 +249,13 @@
+--- configure	2024-06-12 16:35:18.736933604 +0200
++++ configure	2024-06-12 16:57:39.544214075 +0200
+@@ -22533,7 +22362,83 @@
  fi
- 
+
  if $have_icu; then
 -	CXXFLAGS="$CXXFLAGS `$PKG_CONFIG --variable=CXXFLAGS icu-uc`"
 +	is_icu75=false
-+	PKG_CHECK_MODULES(ICU, icu-uc >= 75.1, is_icu75=true, :)
++
++pkg_failed=no
++{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for icu-uc >= 75.1" >&5
++printf %s "checking for icu-uc >= 75.1... " >&6; }
++
++if test -n "$ICU_CFLAGS"; then
++    pkg_cv_ICU_CFLAGS="$ICU_CFLAGS"
++ elif test -n "$PKG_CONFIG"; then
++    if test -n "$PKG_CONFIG" && \
++    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"icu-uc >= 75.1\""; } >&5
++  ($PKG_CONFIG --exists --print-errors "icu-uc >= 75.1") 2>&5
++  ac_status=$?
++  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
++  test $ac_status = 0; }; then
++  pkg_cv_ICU_CFLAGS=`$PKG_CONFIG --cflags "icu-uc >= 75.1" 2>/dev/null`
++		      test "x$?" != "x0" && pkg_failed=yes
++else
++  pkg_failed=yes
++fi
++ else
++    pkg_failed=untried
++fi
++if test -n "$ICU_LIBS"; then
++    pkg_cv_ICU_LIBS="$ICU_LIBS"
++ elif test -n "$PKG_CONFIG"; then
++    if test -n "$PKG_CONFIG" && \
++    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"icu-uc >= 75.1\""; } >&5
++  ($PKG_CONFIG --exists --print-errors "icu-uc >= 75.1") 2>&5
++  ac_status=$?
++  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
++  test $ac_status = 0; }; then
++  pkg_cv_ICU_LIBS=`$PKG_CONFIG --libs "icu-uc >= 75.1" 2>/dev/null`
++		      test "x$?" != "x0" && pkg_failed=yes
++else
++  pkg_failed=yes
++fi
++ else
++    pkg_failed=untried
++fi
++
++
++
++if test $pkg_failed = yes; then
++        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
++printf "%s\n" "no" >&6; }
++
++if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
++        _pkg_short_errors_supported=yes
++else
++        _pkg_short_errors_supported=no
++fi
++        if test $_pkg_short_errors_supported = yes; then
++                ICU_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "icu-uc >= 75.1" 2>&1`
++        else
++                ICU_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "icu-uc >= 75.1" 2>&1`
++        fi
++        # Put the nasty error message in config.log where it belongs
++        echo "$ICU_PKG_ERRORS" >&5
++
++        :
++elif test $pkg_failed = untried; then
++        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
++printf "%s\n" "no" >&6; }
++        :
++else
++        ICU_CFLAGS=$pkg_cv_ICU_CFLAGS
++        ICU_LIBS=$pkg_cv_ICU_LIBS
++        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
++printf "%s\n" "yes" >&6; }
++        is_icu75=true
++fi
 +	if $is_icu75; then
 +		CXXFLAGS="$CXXFLAGS `$PKG_CONFIG --variable=CXXFLAGS -std=c++17 icu-uc`"
 +	else
 +		CXXFLAGS="$CXXFLAGS `$PKG_CONFIG --variable=CXXFLAGS icu-uc`"
 +	fi
- 	AC_DEFINE(HAVE_ICU, 1, [Have ICU library])
- 	if test "x$with_icu" = "xbuiltin"; then
- 		AC_DEFINE(HAVE_ICU_BUILTIN, 1, [Use hb-icu Unicode callbacks])
+
+ printf "%s\n" "#define HAVE_ICU 1" >>confdefs.h
+
+