Backported from
https://github.com/robertdavidgraham/masscan/commit/8e58f7caf78c1d3e8e042dae72d4017cf5a1af86
which was merged shortly after release.

diff --git a/src/pixie-backtrace.c b/src/pixie-backtrace.c
index e7113a2..715b5db 100644
--- a/src/pixie-backtrace.c
+++ b/src/pixie-backtrace.c
@@ -11,7 +11,7 @@
 char global_self[512] = "";
 
 
-#if defined(__linux__)
+#if defined(__GLIBC__)
 #include <unistd.h>
 #include <execinfo.h>
 #include <dlfcn.h>
