diff --git a/scripts/coverage_reset.sh b/scripts/coverage_reset.sh
new file mode 100755
index 0000000..9970738
--- /dev/null
+++ b/scripts/coverage_reset.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+set -e
+
+mv -f ./subprojects/packagecache .
+rm -rf subprojects builddir
+mkdir subprojects
+mv packagecache ./subprojects/
+mkdir builddir
+cp wraps/*.wrap subprojects/
+# on OSX you can't do this with static
+meson setup -Db_coverage=true builddir
diff --git a/scripts/reset_build.sh b/scripts/reset_build.sh
index 9970738..9d56a7f 100755
--- a/scripts/reset_build.sh
+++ b/scripts/reset_build.sh
@@ -8,4 +8,4 @@ mv packagecache ./subprojects/
 mkdir builddir
 cp wraps/*.wrap subprojects/
 # on OSX you can't do this with static
-meson setup -Db_coverage=true builddir
+meson setup builddir
diff --git a/tools/designer.cpp b/tools/designer.cpp
index 45fce18..0208cbb 100644
--- a/tools/designer.cpp
+++ b/tools/designer.cpp
@@ -13,6 +13,7 @@
 #include <locale>
 #include <codecvt>
 #include <vector>
+#include <algorithm>
 
 using namespace fmt;
 using namespace ftxui;
@@ -208,12 +209,12 @@ class GUI {
         return true;
       } else if(event.type ==  sf::Event::KeyPressed) {
         if(KB::isKeyPressed(KB::Up)) {
-          $start_char = std::max(WCHAR_MIN+1, $start_char - $font_grid.page_size());
+          $start_char = std::max(wchar_t(WCHAR_MIN+1), wchar_t($start_char - $font_grid.page_size()));
           $font_grid.render($start_char, false);
           event_happened = true;
           $renderer.clear_cache();
         } else if(KB::isKeyPressed(KB::Down)) {
-          $start_char = std::min(WCHAR_MAX, $start_char + $font_grid.page_size());
+          $start_char = std::min(wchar_t(WCHAR_MAX), wchar_t($start_char + $font_grid.page_size()));
           $font_grid.render($start_char, false);
           $renderer.clear_cache();
         } else if(KB::isKeyPressed(KB::Equal)) {