diff --git a/pkgs/development/compilers/assemblyscript/default.nix b/pkgs/development/compilers/assemblyscript/default.nix
new file mode 100644
index 000000000000..6fe1385bb3fe
--- /dev/null
+++ b/pkgs/development/compilers/assemblyscript/default.nix
@@ -0,0 +1,25 @@
+{ lib
+, buildNpmPackage
+, fetchFromGitHub
+}:
+
+buildNpmPackage rec {
+  pname = "assemblyscript";
+  version = "0.27.5";
+
+  src = fetchFromGitHub {
+    owner = "AssemblyScript";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-3dWIYkiAA61xbUXJGmb/amjHmyXYoy16lLIAZR4sD5k=";
+  };
+
+  npmDepsHash = "sha256-9ILa1qY2GpP2RckcZYcCMmgCwdXIImOm+D8nldeoQL8=";
+
+  meta = with lib; {
+    homepage = "https://github.com/AssemblyScript/${pname}";
+    description = "A TypeScript-like language for WebAssembly";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ lucperkins ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 8b9723ab9aae..59c3d951b4b3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -306,6 +306,8 @@ with pkgs;
 
   asn1c = callPackage ../development/compilers/asn1c { };
 
+  assemblyscript = callPackage ../development/compilers/assemblyscript { };
+
   authy = callPackage ../applications/misc/authy { };
 
   authz0 = callPackage ../tools/security/authz0 { };