diff --git a/.builds/meson_min.yml b/.builds/meson_min.yml
index 3427157b..e8386ca8 100644
--- a/.builds/meson_min.yml
+++ b/.builds/meson_min.yml
@@ -8,8 +8,8 @@ tasks:
     cd janet
     meson setup build --buildtype=release
     cd build
-    meson configure -Dsingle_threaded=true 
-    meson configure -Dnanbox=false 
+    meson configure -Dsingle_threaded=true
+    meson configure -Dnanbox=false
     meson configure -Ddynamic_modules=false
     meson configure -Ddocstrings=false
     meson configure -Dnet=false
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 634ad6c7..88394126 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,10 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
-## Unreleased - ???
+## 1.9.1 - 2020-05-12
+- Add :prefix option to declare-source
+- Re-enable minimal builds with the debugger.
+- Add several flags for configuring Janet on different platforms.
 - Fix broken meson build from 1.9.0 and add meson to CI.
 - Fix compilation issue when nanboxing is disabled.
 
diff --git a/jpm b/jpm
index 6954041b..ff1941ce 100755
--- a/jpm
+++ b/jpm
@@ -833,8 +833,11 @@ int main(int argc, const char **argv) {
     (install-rule sname path)))
 
 (defn declare-source
-  "Create a Janet modules. This does not actually build the module(s),
-  but registers it for packaging and installation."
+  "Create Janet modules. This does not actually build the module(s),
+  but registers them for packaging and installation. :source should be an
+  array of files and directores to copy into JANET_MODPATH or JANET_PATH.
+  :prefix can optionally be given to modify the destination path to be
+  (string JANET_PATH prefix source)."
   [&keys {:source sources :prefix prefix}]
   (def path (string (dyn :modpath JANET_MODPATH) (or prefix "")))
   (if (bytes? sources)
diff --git a/src/conf/janetconf.h b/src/conf/janetconf.h
index e21d1b2c..0c9a2fe9 100644
--- a/src/conf/janetconf.h
+++ b/src/conf/janetconf.h
@@ -29,8 +29,8 @@
 #define JANET_VERSION_MAJOR 1
 #define JANET_VERSION_MINOR 9
 #define JANET_VERSION_PATCH 1
-#define JANET_VERSION_EXTRA "-dev"
-#define JANET_VERSION "1.9.1-dev"
+#define JANET_VERSION_EXTRA ""
+#define JANET_VERSION "1.9.1"
 
 /* #define JANET_BUILD "local" */