diff --git a/penlight-scm-4.rockspec b/penlight-dev-1.rockspec
similarity index 99%
rename from penlight-scm-4.rockspec
rename to penlight-dev-1.rockspec
index 3e4108eb..73246a29 100644
--- a/penlight-scm-4.rockspec
+++ b/penlight-dev-1.rockspec
@@ -1,6 +1,6 @@
 rockspec_format = "3.0"
 package = "penlight"
-version = "scm-4"
+version = "dev-1"
 
 source = {
   url = "git://github.com/lunarmodules/Penlight.git",
diff --git a/rockspecs/penlight-scm-3.rockspec b/rockspecs/penlight-scm-3.rockspec
new file mode 100644
index 00000000..7cba170c
--- /dev/null
+++ b/rockspecs/penlight-scm-3.rockspec
@@ -0,0 +1,69 @@
+package = "penlight"
+version = "scm-3"
+
+source = {
+  url = "git://github.com/lunarmodules/Penlight.git",
+  branch = "master"
+}
+
+description = {
+  summary = "Lua utility libraries loosely based on the Python standard libraries",
+  homepage = "https://lunarmodules.github.io/Penlight",
+  license = "MIT/X11",
+  maintainer = "thijs@thijsschreijer.nl",
+  detailed = [[
+Penlight is a set of pure Lua libraries for making it easier to work with common tasks like
+iterating over directories, reading configuration files and the like. Provides functional operations
+on tables and sequences.
+]]
+}
+
+dependencies = {
+  "luafilesystem"
+}
+
+build = {
+  type = "builtin",
+  modules = {
+    ["pl"] = "lua/pl/init.lua",
+    ["pl.strict"] = "lua/pl/strict.lua",
+    ["pl.dir"] = "lua/pl/dir.lua",
+    ["pl.operator"] = "lua/pl/operator.lua",
+    ["pl.input"] = "lua/pl/input.lua",
+    ["pl.config"] = "lua/pl/config.lua",
+    ["pl.seq"] = "lua/pl/seq.lua",
+    ["pl.stringio"] = "lua/pl/stringio.lua",
+    ["pl.text"] = "lua/pl/text.lua",
+    ["pl.test"] = "lua/pl/test.lua",
+    ["pl.tablex"] = "lua/pl/tablex.lua",
+    ["pl.app"] = "lua/pl/app.lua",
+    ["pl.stringx"] = "lua/pl/stringx.lua",
+    ["pl.lexer"] = "lua/pl/lexer.lua",
+    ["pl.utils"] = "lua/pl/utils.lua",
+    ["pl.compat"] = "lua/pl/compat.lua",
+    ["pl.sip"] = "lua/pl/sip.lua",
+    ["pl.permute"] = "lua/pl/permute.lua",
+    ["pl.pretty"] = "lua/pl/pretty.lua",
+    ["pl.class"] = "lua/pl/class.lua",
+    ["pl.List"] = "lua/pl/List.lua",
+    ["pl.data"] = "lua/pl/data.lua",
+    ["pl.Date"] = "lua/pl/Date.lua",
+    ["pl.luabalanced"] = "lua/pl/luabalanced.lua",
+    ["pl.comprehension"] = "lua/pl/comprehension.lua",
+    ["pl.path"] = "lua/pl/path.lua",
+    ["pl.array2d"] = "lua/pl/array2d.lua",
+    ["pl.func"] = "lua/pl/func.lua",
+    ["pl.lapp"] = "lua/pl/lapp.lua",
+    ["pl.file"] = "lua/pl/file.lua",
+    ['pl.template'] = "lua/pl/template.lua",
+    ["pl.Map"] = "lua/pl/Map.lua",
+    ["pl.MultiMap"] = "lua/pl/MultiMap.lua",
+    ["pl.OrderedMap"] = "lua/pl/OrderedMap.lua",
+    ["pl.Set"] = "lua/pl/Set.lua",
+    ["pl.xml"] = "lua/pl/xml.lua",
+    ["pl.url"] = "lua/pl/url.lua",
+    ["pl.types"] = "lua/pl/types.lua",
+    ["pl.import_into"] = "lua/pl/import_into.lua"
+  },
+  copy_directories = {"docs", "tests"}
+}