diff --git a/experimental/sbcl/APKBUILD b/experimental/sbcl/APKBUILD
new file mode 100644
index 0000000000000000000000000000000000000000..86f9ab1f50be78a5237cd5bded1c74c396eaac67
--- /dev/null
+++ b/experimental/sbcl/APKBUILD
@@ -0,0 +1,38 @@
+# Contributor: Lee Starnes <lee@canned-death.us>
+# Maintainer: Lee Starnes <lee@canned-death.us>
+pkgname=sbcl
+pkgver=2.0.3
+pkgrel=0
+pkgdesc="Steel Bank Common Lisp"
+url="http://www.sbcl.org"
+arch="all !armv7"
+license="BSD-2-Clause AND BSD-2-Clause-FreeBSD AND BSD-3-Clause AND MIT"
+depends=""
+makedepends="clisp clisp-dev"
+checkdepends="ed"
+subpackages="$pkgname-doc"
+# Patch provided by Eric Timmons: https://bugs.launchpad.net/sbcl/+bug/1768368
+source="https://sourceforge.net/projects/$pkgname/files/$pkgname/$pkgver/$pkgname-$pkgver-source.tar.bz2
+ musl-libc.patch"
+
+prepare() {
+ default_prepare
+
+ # run-program test is hard-coded to use /bin/ed but it should be /usr/bin/ed
+ sed -i 's,/bin/ed,/usr/bin/ed,g' tests/run-program.impure.lisp
+}
+
+build() {
+ ./make.sh --prefix=/usr --with-dlclose-is-noop --xc-host=clisp
+}
+
+check() {
+ cd tests && sh run-tests.sh
+}
+
+package() {
+ INSTALL_ROOT="$pkgdir"/usr sh install.sh
+}
+
+sha512sums="c29c115fff0e118e5c05959dd8d73ae876458daeb5ddde67ce485b10e6d1583b1f8a9597b54b45606696ab1b1eea5392dcb09357c83fce31323f2a5a154f2dd1 sbcl-2.0.3-source.tar.bz2
+e6757e4cc623682c501ab5e255a881833ff393efac829ffe9f67fff0a005724c3c03a23352b4c88d58b3d15dbb0cf33c8cc58d72d3795abb2f12a4bca4302165 musl-libc.patch"
diff --git a/experimental/sbcl/musl-libc.patch b/experimental/sbcl/musl-libc.patch
new file mode 100644
index 0000000000000000000000000000000000000000..1aa5cb557340f5df83f9409e8396e4728cdcc5a7
--- /dev/null
+++ b/experimental/sbcl/musl-libc.patch
@@ -0,0 +1,180 @@
+diff --git a/contrib/sb-bsd-sockets/constants.lisp b/contrib/sb-bsd-sockets/constants.lisp
+index 88f5bb7c4..23fd87277 100644
+--- a/contrib/sb-bsd-sockets/constants.lisp
++++ b/contrib/sb-bsd-sockets/constants.lisp
+@@ -93,8 +93,8 @@
+ (:integer EAFNOSUPPORT "EAFNOSUPPORT")
+ (:integer EINPROGRESS "EINPROGRESS")
+
+- (:integer NETDB-INTERNAL #+hpux "h_NETDB_INTERNAL" #-hpux "NETDB_INTERNAL" "See errno.")
+- (:integer NETDB-SUCCESS #+hpux "h_NETDB_SUCCESS" #-hpux "NETDB_SUCCESS" "No problem.")
++ (:integer-no-check NETDB-INTERNAL #-os-provides-netdb-internal "-1" #+(and os-provides-netdb-internal hpux) "h_NETDB_INTERNAL" #+(and os-provides-netdb-internal (not hpux)) "NETDB_INTERNAL" "See errno.")
++ (:integer-no-check NETDB-SUCCESS #-os-provides-netdb-internal "0" #+(and os-provides-netdb-internal hpux) "h_NETDB_SUCCESS" #+(and os-provides-netdb-internal (not hpux)) "NETDB_SUCCESS" "No problem.")
+ (:integer HOST-NOT-FOUND "HOST_NOT_FOUND" "Authoritative Answer Host not found.")
+ (:integer TRY-AGAIN "TRY_AGAIN" "Non-Authoritative Host not found, or SERVERFAIL.")
+ (:integer NO-RECOVERY "NO_RECOVERY" "Non recoverable errors, FORMERR, REFUSED, NOTIMP.")
+diff --git a/src/runtime/linux-os.c b/src/runtime/linux-os.c
+index fa4f5e490..60b5fea4e 100644
+--- a/src/runtime/linux-os.c
++++ b/src/runtime/linux-os.c
+@@ -187,8 +187,15 @@ isnptl (void)
+ if (strstr (buf, "NPTL")) {
+ return 1;
+ }
++ else {
++ return 0;
++ }
++ }
++ else {
++ /* If the configuration variable is empty, just assume we have a
++ * good enough thread implementation. */
++ return 1;
+ }
+- return 0;
+ }
+ #endif
+
+diff --git a/tests/foreign.test.sh b/tests/foreign.test.sh
+index 7fb757813..9ba8ed3cf 100755
+--- a/tests/foreign.test.sh
++++ b/tests/foreign.test.sh
+@@ -248,16 +248,23 @@ cat > $TEST_FILESTEM.test.lisp <<EOF
+ (assert (= 13 foo))
+ (assert (= 42 (bar)))
+ (note "/original definitions ok")
+- (rename-file "$TEST_FILESTEM-b.so" "$TEST_FILESTEM-b.bak")
+- (rename-file "$TEST_FILESTEM-b2.so" "$TEST_FILESTEM-b.so")
+- (load-shared-object (truename "$TEST_FILESTEM-b.so"))
+- (note "/reloading ok")
+- (assert (= 42 foo))
+- (assert (= 13 (bar)))
+- (note "/redefined versions ok")
+- (rename-file "$TEST_FILESTEM-b.so" "$TEST_FILESTEM-b2.so")
+- (rename-file "$TEST_FILESTEM-b.bak" "$TEST_FILESTEM-b.so")
+- (note "/renamed back to originals")
++ ;; test late resolution
++ (eval-when (:compile-toplevel :load-toplevel :execute)
++ (setq *features* (union *features* sb-impl:+internal-features+)))
++ #+dlclose-is-noop
++ (note "/skipping reloading tests")
++ #-dlclose-is-noop
++ (progn
++ (rename-file "$TEST_FILESTEM-b.so" "$TEST_FILESTEM-b.bak")
++ (rename-file "$TEST_FILESTEM-b2.so" "$TEST_FILESTEM-b.so")
++ (load-shared-object (truename "$TEST_FILESTEM-b.so"))
++ (note "/reloading ok")
++ (assert (= 42 foo))
++ (assert (= 13 (bar)))
++ (note "/redefined versions ok")
++ (rename-file "$TEST_FILESTEM-b.so" "$TEST_FILESTEM-b2.so")
++ (rename-file "$TEST_FILESTEM-b.bak" "$TEST_FILESTEM-b.so")
++ (note "/renamed back to originals"))
+
+ ;; test late resolution
+ #+linkage-table
+@@ -274,13 +278,17 @@ cat > $TEST_FILESTEM.test.lisp <<EOF
+ (load-shared-object (truename "$TEST_FILESTEM-c.so"))
+ (assert (= 43 late-foo))
+ (assert (= 14 (late-bar)))
+- (unload-shared-object (truename "$TEST_FILESTEM-c.so"))
+- (multiple-value-bind (val err) (ignore-errors late-foo)
+- (assert (not val))
+- (assert (typep err 'undefined-alien-error)))
+- (multiple-value-bind (val err) (ignore-errors (late-bar))
+- (assert (not val))
+- (assert (typep err 'undefined-alien-error)))
++ #+dlclose-is-noop
++ (note "/skipping unloading tests")
++ #-dlclose-is-noop
++ (progn
++ (unload-shared-object (truename "$TEST_FILESTEM-c.so"))
++ (multiple-value-bind (val err) (ignore-errors late-foo)
++ (assert (not val))
++ (assert (typep err 'undefined-alien-error)))
++ (multiple-value-bind (val err) (ignore-errors (late-bar))
++ (assert (not val))
++ (assert (typep err 'undefined-alien-error))))
+ (note "/linkage table ok"))
+
+ (sb-ext:exit :code $EXIT_LISP_WIN) ; success convention for Lisp program
+diff --git a/tools-for-build/Makefile b/tools-for-build/Makefile
+index 3f6e4ecf9..39bab2b92 100644
+--- a/tools-for-build/Makefile
++++ b/tools-for-build/Makefile
+@@ -16,6 +16,9 @@ LDLIBS:=$(OS_LIBS)
+
+ all: grovel-headers determine-endianness where-is-mcontext
+
++dlclose-is-noop-test-helper.so: dlclose-is-noop-test-helper.c
++ @$(CC) $(LDFLAGS) -shared $< -o $@ $(LOADLIBES) $(LDLIBS)
++
+ clean:
+ rm -f *.o grovel-headers determine-endianness where-is-mcontext
+ rm -f *.exe
+diff --git a/tools-for-build/dlclose-is-noop-test-helper.c b/tools-for-build/dlclose-is-noop-test-helper.c
+new file mode 100644
+index 000000000..4be7a8e5b
+--- /dev/null
++++ b/tools-for-build/dlclose-is-noop-test-helper.c
+@@ -0,0 +1 @@
++int sbcl_dl_close_test = 42;
+diff --git a/tools-for-build/dlclose-is-noop-test.c b/tools-for-build/dlclose-is-noop-test.c
+new file mode 100644
+index 000000000..f4eab26a5
+--- /dev/null
++++ b/tools-for-build/dlclose-is-noop-test.c
+@@ -0,0 +1,19 @@
++/* test to build and run so that we know if we have a noop dlclose
++ */
++
++#include <dlfcn.h>
++#include <stddef.h>
++
++int main ()
++{
++ void * handle = dlopen("./dlclose-is-noop-test-helper.so", RTLD_NOW | RTLD_GLOBAL);
++ dlclose(handle);
++
++ handle = dlopen("./dlclose-is-noop-test-helper.so", RTLD_NOW | RTLD_NOLOAD);
++
++ if (handle != NULL) {
++ return 104;
++ } else {
++ return 0;
++ }
++}
+diff --git a/tools-for-build/grovel-features.sh b/tools-for-build/grovel-features.sh
+index ffc4307eb..bf1448a6a 100644
+--- a/tools-for-build/grovel-features.sh
++++ b/tools-for-build/grovel-features.sh
+@@ -36,3 +36,12 @@
+ if [ "$sbcl_arch" = arm ] ; then
+ featurep arm-softfp
+ fi
++
++featurep os-provides-netdb-internal
++
++# We need a helper shared library to test dlclose-is-noop
++$GNUMAKE dlclose-is-noop-test-helper.so > /dev/null 2>&1
++
++featurep dlclose-is-noop
++
++rm -f dlclose-is-noop-test-helper.so
+diff --git a/tools-for-build/os-provides-netdb-internal-test.c b/tools-for-build/os-provides-netdb-internal-test.c
+new file mode 100644
+index 000000000..cab08cc41
+--- /dev/null
++++ b/tools-for-build/os-provides-netdb-internal-test.c
+@@ -0,0 +1,12 @@
++#include <netdb.h>
++
++int main ()
++{
++#if defined NETDB_INTERNAL && defined NETDB_SUCCESS
++ return 104;
++#elif defined h_NETDB_INTERNAL && defined h_NETDB_SUCCESS
++ return 104;
++#else
++ return 0;
++#endif
++}
diff --git a/user/clisp/APKBUILD b/user/clisp/APKBUILD
new file mode 100644
index 0000000000000000000000000000000000000000..d9f80ebef7f0640965ea1cc7b5aa0082caa17c33
--- /dev/null
+++ b/user/clisp/APKBUILD
@@ -0,0 +1,44 @@
+# Contributor: Soren Tempel <soeren+alpine@soeren-tempel.net>
+# Contrubutor: Carlo Landmeter <clandmeter@gmail.com>
+# Contributor: Lee Starnes <lee@canned-death.us>
+# Maintainer: Lee Starnes <lee@canned-death.us>
+pkgname=clisp
+pkgver=2.49
+pkgrel=0
+pkgdesc="ANSI Common Lisp interpreter, compiler, and debugger"
+url="https://clisp.sourceforge.io"
+arch="all"
+license="GPL-2.0-only"
+depends=""
+depends_dev="libsigsegv-dev libffcall ncurses-dev"
+makedepends="$depends_dev"
+subpackages="$pkgname-dev $pkgname-doc"
+source="https://downloads.sourceforge.net/sourceforge/$pkgname/$pkgname-$pkgver.tar.bz2
+ no-page.h.patch"
+
+prepare() {
+ default_prepare
+ update_config_sub
+}
+
+build() {
+ ./configure \
+ --prefix=/usr \
+ --with-ffcall \
+ --mandir=/usr/share/man \
+ --infodir=/usr/share/info \
+ "$builddir"
+ # Parallel builds fail
+ make -j1
+}
+
+check() {
+ make check
+}
+
+package() {
+ make -j1 DESTDIR="$pkgdir" install
+}
+
+sha512sums="eef66fc85199a2c283b616db61bf67ff103eeb0f19fa907da48994dc790b6f5f8d0c74fb3bd723c6b827c0ff3cfd89fa6ba67934fc669ed5d5249044b5140d81 clisp-2.49.tar.bz2
+86273c5d5d05a8d41ab6311192e0c757d3f7fe4d78546590830aa00f8c2f170fcb08f66ea739ae8834cec00cdf0f6a20824eb6a3d0f6df97be405c26b1cc5d39 no-page.h.patch"
diff --git a/user/clisp/no-page.h.patch b/user/clisp/no-page.h.patch
new file mode 100644
index 0000000000000000000000000000000000000000..aafb98a31e7c8c9b06084d5be9d56d031ca81c17
--- /dev/null
+++ b/user/clisp/no-page.h.patch
@@ -0,0 +1,12 @@
+--- a/src/unix.d
++++ b/src/unix.d
+@@ -135,9 +135,6 @@
+ #ifdef UNIX_AUX
+ #include <sys/mmu.h> /* for SHMLBA */
+ #endif
+- #if defined(UNIX_LINUX) && !defined(UNIX_GNU)
+- #include <asm/page.h> /* for SHMLBA on Linux 2.0 */
+- #endif
+ /* <sys/shm.h> declares shmget(), shmat(), shmdt(), shmctl() */
+ #endif
+ /* used by SPVW, STREAM */
diff --git a/user/libffcall/APKBUILD b/user/libffcall/APKBUILD
new file mode 100644
index 0000000000000000000000000000000000000000..a3bdfde1a391c07b3d0ab878e82e19875fbd3520
--- /dev/null
+++ b/user/libffcall/APKBUILD
@@ -0,0 +1,39 @@
+# Contributor: Carlo Landmeter <clandmeter@gmail.com>
+# Contributor: Will Sinatra <wpsinatra@gmail.com>
+# Contributor: Lee Starnes <lee@canned-death.us>
+# Maintainer: Lee Starnes <lee@canned-death.us>
+pkgname=libffcall
+pkgver=2.2
+pkgrel=0
+pkgdesc="C library for implementing foreign function calls in embedded interpreters"
+url="https://www.gnu.org/software/libffcall"
+arch="all"
+license="GPL-2.0+"
+depends=""
+makedepends=""
+subpackages="$pkgname-dev $pkgname-doc"
+source="https://ftp.gnu.org/gnu/libffcall/libffcall-$pkgver.tar.gz"
+
+build() {
+ ./configure \
+ --build=$CBUILD \
+ --host=$CHOST \
+ --prefix=/usr \
+ --sysconfdir=/etc \
+ --mandir=/usr/share/man \
+ --infodir=/usr/share/info \
+ --localstatedir=/var
+ # Fails to build if building in parallel
+ make -j1
+}
+
+check() {
+ make check
+}
+
+package() {
+ make DESTDIR="$pkgdir" htmldir=/usr/share/doc/ffcall install
+
+}
+
+sha512sums="b9d3ca4c67ab92915a8183d850153e585dcb58ceb2199a104426a7aae363d37017b1226440acd18a2db0cc207e044f71e932857189964261e8eaa6de5cef1731 libffcall-2.2.tar.gz"
diff --git a/user/libsigsegv/APKBUILD b/user/libsigsegv/APKBUILD
new file mode 100644
index 0000000000000000000000000000000000000000..bb21149a3d62b2781886d8dfc2ef7a13ddde8ce9
--- /dev/null
+++ b/user/libsigsegv/APKBUILD
@@ -0,0 +1,35 @@
+# Contributor: Carlo Landmeter <clandmeter@gmail.com>
+# Contributor: Lee Starnes <lee@canned-death.us>
+# Maintainer: Lee Starnes <lee@canned-death.us>
+pkgname=libsigsegv
+pkgver=2.12
+pkgrel=0
+pkgdesc="A library for handling page faults in user mode"
+url="https://www.gnu.org/software/libsigsegv"
+arch="all"
+license="GPL-2.0+"
+depends=""
+makedepends=""
+subpackages="$pkgname-dev"
+source="https://ftp.gnu.org/gnu/$pkgname/$pkgname-$pkgver.tar.gz"
+
+build() {
+ ./configure \
+ --prefix=/usr \
+ --build=$CBUILD \
+ --host=$CHOST \
+ --localstatedir=/var \
+ --sysconfdir=/etc \
+ --enable-shared
+ make
+}
+
+check() {
+ make check
+}
+
+package() {
+ make DESTDIR="$pkgdir" install
+}
+
+sha512sums="27986e8aaf4357ed131032aa7c281a5a28c5759530c62bb76f034aea33959547dcaae805e06347a1f532f0488b72fbbbdac4400f74e8d3f2128511526e8a5913 libsigsegv-2.12.tar.gz"