diff --git a/testing/massivethreads/0001-musl-fixes.patch b/testing/massivethreads/0001-musl-fixes.patch
new file mode 100644
index 00000000000..6053a8f104d
--- /dev/null
+++ b/testing/massivethreads/0001-musl-fixes.patch
@@ -0,0 +1,77 @@
+diff --git a/src/myth_io.h b/src/myth_io.h
+index e0b61551b8..832629c352 100644
+--- a/src/myth_io.h
++++ b/src/myth_io.h
+@@ -6,6 +6,7 @@
+ #define MYTH_IO_H_
+
+ #include <sys/socket.h>
++#include <sys/select.h>
+ #include <stdint.h>
+ #include <stdarg.h>
+
+
+
+diff --git a/src/Makefile.am b/patchMakefile.am
+index f55b46a5e5..f9a3e631ae 100644
+--- a/src/Makefile.am
++++ b/patchMakefile.am
+@@ -18,7 +18,8 @@ COMMON_SRCS = \
+ 	myth_context.c \
+ 	myth_if_native.c \
+ 	myth_real.c \
+-	myth_eco.c
++	myth_eco.c \
++	pthread.c
+
+ # sources for wrapping system functions (used only for -dl and -ld versions)
+ WRAP_SRCS = \
+
+
+diff --git a/src/pthread.h b/src/pthread.h
+new file mode 100644
+index 0000000000..1a81566b46
+--- /dev/null
++++ b/src/pthread.h
+@@ -0,0 +1,15 @@
++#ifndef _MUSL_PTHREAD_H_OVERRIDE
++#define _MUSL_PTHREAD_H_OVERRIDE
++
++#include <errno.h>
++#include_next <pthread.h>
++
++// musl's pthread_equal is a macro
++#undef pthread_equal
++int pthread_equal(pthread_t t1, pthread_t t2);
++
++// musl doesn't define mutexattr functions
++int pthread_mutexattr_getprioceiling(const pthread_mutexattr_t *__restrict, int *__restrict);
++int pthread_mutexattr_setprioceiling(pthread_mutexattr_t *, int);
++
++#endif//_MUSL_PTHREAD_H_OVERRIDE
+
+
+diff --git a/src/pthread.c b/src/pthread.c
+new file mode 100644
+index 0000000000..10f57c0fb7
+--- /dev/null
++++ b/src/pthread.c
+@@ -0,0 +1,18 @@
++#include <pthread.h>
++
++int pthread_equal(pthread_t t1, pthread_t t2) {
++	return t1 == t2;
++}
++
++int pthread_mutexattr_getprioceiling( const pthread_mutexattr_t *restrict attr
++                                    , int *restrict prioceiling )
++{
++  if (prioceiling) *prioceiling = 99;
++  return 0;
++}
++
++int pthread_mutexattr_setprioceiling( pthread_mutexattr_t *attr
++                                    , int prioceiling )
++{
++  return EPERM;
++}
diff --git a/testing/massivethreads/APKBUILD b/testing/massivethreads/APKBUILD
new file mode 100644
index 00000000000..46ed95e9e23
--- /dev/null
+++ b/testing/massivethreads/APKBUILD
@@ -0,0 +1,48 @@
+# Contributor: Hazem <hazem-alpine@riseup.net>
+# Maintainer: Hazem <hazem-alpine@riseup.net>
+pkgname=massivethreads
+pkgver=1.00
+pkgrel=0
+pkgdesc="Lightweight Thread Library for High Productivity Languages"
+url="https://github.com/massivethreads/massivethreads"
+arch="x86_64"
+license="BSD-2-Clause"
+makedepends="autoconf automake"
+subpackages="$pkgname-dev"
+source="
+	https://github.com/massivethreads/massivethreads/archive/refs/tags/v$pkgver/massivethreads-$pkgver.tar.gz
+	0001-musl-fixes.patch
+"
+
+build() {
+	aclocal # needed because we patch Makefile.ac
+	automake -a
+	./configure \
+		--build=$CBUILD \
+		--host=$CHOST \
+		--prefix=/usr \
+		--sysconfdir=/etc \
+		--mandir=/usr/share/man \
+		--localstatedir=/var \
+		--disable-myth-dl \
+		--disable-myth-ld
+	make
+}
+
+check() {
+	# pvalloc is not implemented in musl and not needed in massivethreads
+	# only referenced for wrapping in myth-dl/ld which we disable anyway
+	echo 'main(){}' > $builddir/tests/myth_pvalloc.c
+	make check
+}
+
+package() {
+	make DESTDIR="$pkgdir" install
+	rm -f $pkgdir/usr/bin/*
+	rm -f $pkgdir/usr/lib/libdr*
+}
+
+sha512sums="
+aaea978bf0d41a9a97ccf0d8c5be318feb1e547e72f7dea267ddc3a18d653831465d531c193f79e8f75d75b12945d3dab882d93596d90dda7f70676fe87ea72e  massivethreads-1.00.tar.gz
+6e45f1053580460bf203c4e92e9889a3d7a46adfc4d38b4e75eaab8b73c3992fc928f6ff94960e7cb00bbc02fb61b6ab4646daf7051f69166780b62eb6ba5a5f  0001-musl-fixes.patch
+"