diff --git a/skarnet-builder/build-latest b/skarnet-builder/build-latest
index c8b2e27..5f9f37a 100755
--- a/skarnet-builder/build-latest
+++ b/skarnet-builder/build-latest
@@ -44,6 +44,7 @@ s6-rc
 # platform
 declare -A targets
 targets[arm-linux-musleabihf]=armhf
+targets[aarch64-linux-musl]=aarch64
 targets[x86_64-linux-musl]=amd64
 targets[i486-linux-musl]=x86
 
diff --git a/skarnet-builder/sysdeps/aarch64-linux-musl/socket.lib b/skarnet-builder/sysdeps/aarch64-linux-musl/socket.lib
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/skarnet-builder/sysdeps/aarch64-linux-musl/socket.lib
@@ -0,0 +1 @@
+
diff --git a/skarnet-builder/sysdeps/aarch64-linux-musl/spawn.lib b/skarnet-builder/sysdeps/aarch64-linux-musl/spawn.lib
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/skarnet-builder/sysdeps/aarch64-linux-musl/spawn.lib
@@ -0,0 +1 @@
+
diff --git a/skarnet-builder/sysdeps/aarch64-linux-musl/sysclock.lib b/skarnet-builder/sysdeps/aarch64-linux-musl/sysclock.lib
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/skarnet-builder/sysdeps/aarch64-linux-musl/sysclock.lib
@@ -0,0 +1 @@
+
diff --git a/skarnet-builder/sysdeps/aarch64-linux-musl/sysdeps b/skarnet-builder/sysdeps/aarch64-linux-musl/sysdeps
new file mode 100644
index 0000000..329a956
--- /dev/null
+++ b/skarnet-builder/sysdeps/aarch64-linux-musl/sysdeps
@@ -0,0 +1,43 @@
+target: aarch64-linux-musl
+clockrt: yes
+clockmon: yes
+posixspawn: yes
+timer: yes
+endianness: little
+sizeofushort: 2
+sizeofuint: 4
+sizeofulong: 8
+sizeofgid: 4
+sizeoftime: 8
+accept4: yes
+ancilautoclose: no
+cmsgcloexec: yes
+devurandom: yes
+eproto: yes
+eventfd: yes
+flock: yes
+getpeereid: no
+sopeercred: yes
+getpeerucred: no
+ipv6: yes
+malloc0: yes
+msgdontwait: yes
+nbwaitall: yes
+openat: yes
+linkat: yes
+pipe2: yes
+ppoll: yes
+revoke: no
+sendfile: yes
+setgroups: yes
+settimeofday: yes
+signalfd: no
+splice: yes
+strcasestr: yes
+strnlen: yes
+uint64t: yes
+futimens: yes
+futimes: yes
+arc4random: no
+getrandom: no
+itimer: yes
diff --git a/skarnet-builder/sysdeps/aarch64-linux-musl/sysdeps.h b/skarnet-builder/sysdeps/aarch64-linux-musl/sysdeps.h
new file mode 100644
index 0000000..c0baa45
--- /dev/null
+++ b/skarnet-builder/sysdeps/aarch64-linux-musl/sysdeps.h
@@ -0,0 +1,54 @@
+/* ISC license. */
+
+#ifndef SYSDEPS_H
+#define SYSDEPS_H
+
+#define SKALIBS_TARGET "aarch64-linux-musl"
+#define SKALIBS_HASCLOCKRT
+#define SKALIBS_HASCLOCKMON
+#define SKALIBS_HASPOSIXSPAWN
+#define SKALIBS_HASTIMER
+#define SKALIBS_ENDIANNESS "little"
+#define SKALIBS_SIZEOFUSHORT 2
+#define SKALIBS_USHORT_BITS 16
+#define SKALIBS_SIZEOFUINT 4
+#define SKALIBS_UINT_BITS 32
+#define SKALIBS_SIZEOFULONG 8
+#define SKALIBS_ULONG_BITS 64
+#define SKALIBS_SIZEOFGID 4
+#define SKALIBS_GID_BITS 32
+#define SKALIBS_SIZEOFTIME 8
+#define SKALIBS_TIME_BITS 64
+#define SKALIBS_HASACCEPT4
+#undef SKALIBS_HASANCILAUTOCLOSE
+#define SKALIBS_HASCMSGCLOEXEC
+#define SKALIBS_HASDEVURANDOM
+#define SKALIBS_HASEPROTO
+#define SKALIBS_HASEVENTFD
+#define SKALIBS_HASFLOCK
+#undef SKALIBS_HASGETPEEREID
+#define SKALIBS_HASSOPEERCRED
+#undef SKALIBS_HASGETPEERUCRED
+#define SKALIBS_HASIPV6
+#define SKALIBS_HASMALLOC0
+#define SKALIBS_HASMSGDONTWAIT
+#define SKALIBS_HASNBWAITALL
+#define SKALIBS_HASOPENAT
+#define SKALIBS_HASLINKAT
+#define SKALIBS_HASPIPE2
+#define SKALIBS_HASPPOLL
+#undef SKALIBS_HASREVOKE
+#define SKALIBS_HASSENDFILE
+#define SKALIBS_HASSETGROUPS
+#define SKALIBS_HASSETTIMEOFDAY
+#undef SKALIBS_HASSIGNALFD
+#define SKALIBS_HASSPLICE
+#define SKALIBS_HASSTRCASESTR
+#define SKALIBS_HASSTRNLEN
+#define SKALIBS_HASUINT64T
+#define SKALIBS_HASFUTIMENS
+#define SKALIBS_HASFUTIMES
+#undef SKALIBS_HASARC4RANDOM
+#undef SKALIBS_HASGETRANDOM
+#define SKALIBS_HASITIMER
+#endif
diff --git a/skarnet-builder/sysdeps/aarch64-linux-musl/tainnow.lib b/skarnet-builder/sysdeps/aarch64-linux-musl/tainnow.lib
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/skarnet-builder/sysdeps/aarch64-linux-musl/tainnow.lib
@@ -0,0 +1 @@
+
diff --git a/skarnet-builder/sysdeps/aarch64-linux-musl/target b/skarnet-builder/sysdeps/aarch64-linux-musl/target
new file mode 100644
index 0000000..32aa1dd
--- /dev/null
+++ b/skarnet-builder/sysdeps/aarch64-linux-musl/target
@@ -0,0 +1 @@
+aarch64-linux-musl
diff --git a/skarnet-builder/sysdeps/aarch64-linux-musl/timer.lib b/skarnet-builder/sysdeps/aarch64-linux-musl/timer.lib
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/skarnet-builder/sysdeps/aarch64-linux-musl/timer.lib
@@ -0,0 +1 @@
+
diff --git a/skarnet-builder/sysdeps/aarch64-linux-musl/util.lib b/skarnet-builder/sysdeps/aarch64-linux-musl/util.lib
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/skarnet-builder/sysdeps/aarch64-linux-musl/util.lib
@@ -0,0 +1 @@
+