diff --git a/fiv-io-cmm.c b/fiv-io-cmm.c
index b131acf..8a8b8dc 100644
--- a/fiv-io-cmm.c
+++ b/fiv-io-cmm.c
@@ -400,7 +400,8 @@ fiv_io_cmm_argb32_premultiply(FivIoCmm *self,
 #else  // ! HAVE_LCMS2 || LCMS_VERSION < 2130
 
 static void
-fiv_io_cmm_argb32(FivIoCmm *, FivIoImage *, FivIoProfile *, FivIoProfile *)
+fiv_io_cmm_argb32(G_GNUC_UNUSED FivIoCmm *self, G_GNUC_UNUSED FivIoImage *image,
+	G_GNUC_UNUSED FivIoProfile *source, G_GNUC_UNUSED FivIoProfile *target)
 {
 	// TODO(p): Unpremultiply, transform, repremultiply. Or require lcms2>=2.13.
 }
diff --git a/fiv-io.c b/fiv-io.c
index 2ea06cf..24db289 100644
--- a/fiv-io.c
+++ b/fiv-io.c
@@ -61,6 +61,9 @@
 #ifdef HAVE_LIBTIFF
 #include <tiff.h>
 #include <tiffio.h>
+#ifndef TIFF_TMSIZE_T_MAX
+#define TIFF_TMSIZE_T_MAX ((tmsize_t) (SIZE_MAX >> 1))
+#endif
 #endif  // HAVE_LIBTIFF
 #ifdef HAVE_GDKPIXBUF
 #include <gdk-pixbuf/gdk-pixbuf.h>
diff --git a/fiv-view.c b/fiv-view.c
index fb01b3a..f0cd577 100644
--- a/fiv-view.c
+++ b/fiv-view.c
@@ -646,7 +646,8 @@ reload_screen_cms_profile(FivView *self, GdkWindow *window)
 				gchar *data = NULL;
 				gsize length = 0;
 				if (g_file_get_contents(path, &data, &length, NULL))
-					self->screen_cms_profile = fiv_io_profile_new(data, length);
+					self->screen_cms_profile = fiv_io_cmm_get_profile(
+						fiv_io_cmm_get_default(), data, length);
 				g_free(data);
 			}
 			g_free(path);
diff --git a/msys2-configure.sh b/msys2-configure.sh
index 2f43d0d..7b7724e 100755
--- a/msys2-configure.sh
+++ b/msys2-configure.sh
@@ -75,10 +75,15 @@ extract() {
 		--exclude '*/share/man' --exclude '*/share/doc'
 	done < db.want
 
-	bsdtar -xf exiftool.tar.gz
-	mv Image-ExifTool-*/exiftool bin
-	mv Image-ExifTool-*/lib/* lib/perl5/site_perl
-	rm -rf Image-ExifTool-*
+	# Don't require Perl, which may not exist anymore on i686:
+	# https://github.com/msys2/MINGW-packages/pull/20085
+	if [ -d lib/perl5 ]
+	then
+		bsdtar -xf exiftool.tar.gz
+		mv Image-ExifTool-*/exiftool bin
+		mv Image-ExifTool-*/lib/* lib/perl5/site_perl
+		rm -rf Image-ExifTool-*
+	fi
 }
 
 configure() {
diff --git a/msys2-install.sh b/msys2-install.sh
index da2d2f1..4cebb73 100755
--- a/msys2-install.sh
+++ b/msys2-install.sh
@@ -12,15 +12,15 @@ fi
 
 # Copy binaries we directly or indirectly depend on.
 cp -p "$msys2_root"/bin/*.dll .
-cp -p "$msys2_root"/bin/wperl.exe .
-cp -p "$msys2_root"/bin/exiftool .
+cp -p "$msys2_root"/bin/wperl.exe . || :
+cp -p "$msys2_root"/bin/exiftool . || :
 # The console helper is only useful for debug builds.
 cp -p "$msys2_root"/bin/gspawn-*-helper*.exe .
 cp -pR "$msys2_root"/etc/ .
 
 mkdir -p lib
 cp -pR "$msys2_root"/lib/gdk-pixbuf-2.0/ lib
-cp -pR "$msys2_root"/lib/perl5/ lib
+cp -pR "$msys2_root"/lib/perl5/ lib || :
 mkdir -p share/glib-2.0/schemas
 cp -pR "$msys2_root"/share/glib-2.0/schemas/*.Settings.* share/glib-2.0/schemas
 mkdir -p share/icons