build error: 'int32_t'/'int64_t' does not name a type (musl)

[peppergrayxyz]

building on musl fails with errors due to missing header <cstdint>:

In file included from /ws/lib/linuxdeploy-desktopfile/src/desktopfileentry.cpp:5:
/ws/lib/linuxdeploy-desktopfile/include/linuxdeploy/desktopfile/desktopfileentry.h:52:13: error: 'int32_t' does not name a type
   52 |             int32_t asInt() const;
      |             ^~~~~~~
/ws/lib/linuxdeploy-desktopfile/include/linuxdeploy/desktopfile/desktopfileentry.h:7:1: note: 'int32_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
    6 | #include <vector>
  +++ |+#include <cstdint>
    7 |
/ws/lib/linuxdeploy-desktopfile/include/linuxdeploy/desktopfile/desktopfileentry.h:56:13: error: 'int64_t' does not name a type
   56 |             int64_t asLong() const;
      |             ^~~~~~~
/ws/lib/linuxdeploy-desktopfile/include/linuxdeploy/desktopfile/desktopfileentry.h:56:13: note: 'int64_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
/ws/lib/linuxdeploy-desktopfile/src/desktopfileentry.cpp:76:9: error: 'int32_t' does not name a type
   76 |         int32_t DesktopFileEntry::asInt() const {
      |         ^~~~~~~
/ws/lib/linuxdeploy-desktopfile/src/desktopfileentry.cpp:7:1: note: 'int32_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
    6 | #include "util.h"
  +++ |+#include <cstdint>
    7 |
/ws/lib/linuxdeploy-desktopfile/src/desktopfileentry.cpp:82:9: error: 'int64_t' does not name a type
   82 |         int64_t DesktopFileEntry::asLong() const {
      |         ^~~~~~~
/ws/lib/linuxdeploy-desktopfile/src/desktopfileentry.cpp:82:9: note: 'int64_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
ninja: job failed: /usr/bin/g++  -I/ws/lib/linuxdeploy-desktopfile/include -std=gnu++11 -fPIC -MD -MT lib/linuxdeploy-desktopfile/src/CMakeFiles/_linuxdeploy_desktopfile_objs.dir/desktopfileentry.cpp.o -MF lib/linuxdeploy-desktopfile/src/CMakeFiles/_linuxdeploy_desktopfile_objs.dir/desktopfileentry.cpp.o.d -o lib/linuxdeploy-desktopfile/src/CMakeFiles/_linuxdeploy_desktopfile_objs.dir/desktopfileentry.cpp.o -c /ws/lib/linuxdeploy-desktopfile/src/desktopfileentry.cpp