diff --git a/fiv-browser.c b/fiv-browser.c
index c9963f4..4a904f0 100644
--- a/fiv-browser.c
+++ b/fiv-browser.c
@@ -828,9 +828,18 @@ thumbnailer_next(Thumbnailer *t)
 		"--thumbnail", fiv_thumbnail_sizes[self->item_size].thumbnail_spec_name,
 		"--", uri, NULL};
 
+	GSubprocessLauncher *launcher =
+		g_subprocess_launcher_new(G_SUBPROCESS_FLAGS_STDOUT_PIPE);
+#ifdef G_OS_WIN32
+	gchar *prefix = g_win32_get_package_installation_directory_of_module(NULL);
+	g_subprocess_launcher_set_cwd(launcher, prefix);
+	g_free(prefix);
+#endif
+
 	GError *error = NULL;
-	t->minion = g_subprocess_newv(t->target->icon ? argv_faster : argv_slower,
-		G_SUBPROCESS_FLAGS_STDOUT_PIPE, &error);
+	t->minion = g_subprocess_launcher_spawnv(
+		launcher, t->target->icon ? argv_faster : argv_slower, &error);
+	g_object_unref(launcher);
 	if (error) {
 		g_warning("%s", error->message);
 		g_error_free(error);
diff --git a/fiv-context-menu.c b/fiv-context-menu.c
index 16460b6..678c616 100644
--- a/fiv-context-menu.c
+++ b/fiv-context-menu.c
@@ -185,15 +185,24 @@ info_spawn(GtkWidget *dialog, const char *path, GBytes *bytes_in)
 	if (bytes_in)
 		flags |= G_SUBPROCESS_FLAGS_STDIN_PIPE;
 
+	GSubprocessLauncher *launcher = g_subprocess_launcher_new(flags);
+#ifdef G_OS_WIN32
+	// Both to find wperl, and then to let wperl find the nearby exiftool.
+	gchar *prefix = g_win32_get_package_installation_directory_of_module(NULL);
+	g_subprocess_launcher_set_cwd(launcher, prefix);
+	g_free(prefix);
+#endif
+
 	// TODO(p): Add a fallback to internal capabilities.
 	// The simplest is to specify the filename and the resolution.
 	GError *error = NULL;
-	GSubprocess *subprocess = g_subprocess_new(flags, &error,
+	GSubprocess *subprocess = g_subprocess_launcher_spawn(launcher, &error,
 #ifdef G_OS_WIN32
 		"wperl",
 #endif
 		"exiftool", "-tab", "-groupNames", "-duplicates", "-extractEmbedded",
 		"--binary", "-quiet", "--", path, NULL);
+	g_object_unref(launcher);
 	if (error) {
 		info_redirect_error(dialog, error);
 		return;