diff --git a/srcpkgs/joker/patches/cross_build_gh_issue_200.patch b/srcpkgs/joker/patches/cross_build_gh_issue_200.patch
new file mode 100644
index 00000000000..4d2a21d07ca
--- /dev/null
+++ b/srcpkgs/joker/patches/cross_build_gh_issue_200.patch
@@ -0,0 +1,61 @@
+diff --git core/array_map.go core/array_map.go
+index 3d9b95d..6e03cfa 100644
+--- core/array_map.go
++++ core/array_map.go
+@@ -21,7 +21,7 @@ type (
+ )
+ 
+ var (
+-	HASHMAP_THRESHOLD int = 16
++	HASHMAP_THRESHOLD int64 = 16
+ )
+ 
+ func EmptyArrayMap() *ArrayMap {
+@@ -169,7 +169,7 @@ func (m *ArrayMap) Assoc(key Object, value Object) Associative {
+ 		res.arr[i+1] = value
+ 		return res
+ 	}
+-	if len(m.arr) >= HASHMAP_THRESHOLD {
++	if int64(len(m.arr)) >= HASHMAP_THRESHOLD {
+ 		return NewHashMap(m.arr...).Assoc(key, value)
+ 	}
+ 	res := m.Clone()
+diff --git core/eval.go core/eval.go
+index 42b7ff2..49ade93 100644
+--- core/eval.go
++++ core/eval.go
+@@ -204,7 +204,7 @@ func (expr *VectorExpr) Eval(env *LocalEnv) Object {
+ }
+ 
+ func (expr *MapExpr) Eval(env *LocalEnv) Object {
+-	if len(expr.keys) > HASHMAP_THRESHOLD/2 {
++	if int64(len(expr.keys)) > HASHMAP_THRESHOLD/2 {
+ 		res := EmptyHashMap
+ 		for i := range expr.keys {
+ 			key := Eval(expr.keys[i], env)
+diff --git core/read.go core/read.go
+index 199fd72..1a03ca8 100644
+--- core/read.go
++++ core/read.go
+@@ -604,7 +604,7 @@ func readMapWithNamespace(reader *Reader, nsname string) Object {
+ 	if len(objs)%2 != 0 {
+ 		panic(MakeReadError(reader, "Map literal must contain an even number of forms"))
+ 	}
+-	if len(objs) > HASHMAP_THRESHOLD {
++	if int64(len(objs)) >= HASHMAP_THRESHOLD {
+ 		hashMap := NewHashMap()
+ 		for i := 0; i < len(objs); i += 2 {
+ 			key := resolveKey(objs[i], nsname)
+diff --git main.go main.go
+index 126f221..bfd1b84 100644
+--- main.go
++++ main.go
+@@ -437,7 +437,7 @@ func parseArgs(args []string) {
+ 				if thresh < 0 {
+ 					HASHMAP_THRESHOLD = math.MaxInt64
+ 				} else {
+-					HASHMAP_THRESHOLD = thresh
++					HASHMAP_THRESHOLD = int64(thresh)
+ 				}
+ 			} else {
+ 				missing = true
diff --git a/srcpkgs/joker/template b/srcpkgs/joker/template
new file mode 100644
index 00000000000..d5ffcb4c759
--- /dev/null
+++ b/srcpkgs/joker/template
@@ -0,0 +1,29 @@
+# Template file for 'joker'
+pkgname=joker
+version=0.12.1
+revision=1
+build_style=go
+go_import_path="github.com/candid82/joker"
+hostmakedepends="git"
+short_desc="Interpreted dialect of Clojure written in Go and Clojure(Script) linter"
+maintainer="Dominic Monroe <monroef4@googlemail.com>"
+license="EPL-1.0"
+homepage="https://joker-lang.org/"
+distfiles="https://github.com/candid82/joker/archive/v${version}.tar.gz"
+checksum=b019b96f9a36cb88749701c8e93a3d811ee26f6c453595320a3ab3adca404c09
+
+if [ "$CROSS_BUILD" ]; then
+	hostmakedepends+=" joker"
+fi
+
+pre_build() {
+	JOKER="joker"
+
+	if [ -z "$CROSS_BUILD" ]; then
+		JOKER="../joker"
+		go generate ./...
+		go build
+	fi
+
+	(cd std; "$JOKER" --hashmap-threshold 8192 generate-std.joke)
+}