diff --git a/utils/libadalang.gpr.patch b/utils/libadalang.gpr.patch
new file mode 100644
index 000000000..14a2801d5
--- /dev/null
+++ b/utils/libadalang.gpr.patch
@@ -0,0 +1,24 @@
+--- libadalang.gpr.old
++++ libadalang.gpr
+@@ -25,10 +25,7 @@ library project Libadalang is
+       Enable_Warnings : Boolean :=
+         external ("LIBADALANG_WARNINGS", "false");
+ 
+-   Primary_Source_Dirs :=
+-     ("/tmp/libadalang-21.0.0/include/libadalang", "/tmp/lal-21.0.0/ada/extensions/src");
+-
+-      for Source_Dirs use Primary_Source_Dirs;
++      for Source_Dirs use ("src");
+ 
+    for Languages use 
+    ("Ada", "C")
+@@ -41,8 +38,8 @@ library project Libadalang is
+ ;
+ 
+    for Library_Dir use
+-      "../libadalang/" & Library_Kind_Param & "/" & Build_Mode;
+-   for Object_Dir use "../../obj/libadalang/" & Build_Mode;
++      "lib/" & Build_Mode;
++   for Object_Dir use "obj/" & Build_Mode;
+ 
+    Target := Libadalang'Target;
diff --git a/utils/mains.gpr.patch b/utils/mains.gpr.patch
new file mode 100644
index 000000000..b5321b7c5
--- /dev/null
+++ b/utils/mains.gpr.patch
@@ -0,0 +1,22 @@
+--- mains.gpr.old
++++ mains.gpr
+@@ -1,4 +1,3 @@
+-
+ with "langkit_support";
+ with "libadalang";
+ 
+@@ -9,12 +8,10 @@
+ 
+    for Languages use ("Ada");
+ 
+-   
+    for Source_Dirs use (
+-      ".", "../../lal-21.0.0/ada/testsuite/ada", "../../lal-21.0.0/ada/testsuite/ada/gnat_compare"
++      "src-mains"
+    );
+-   for Exec_Dir use "../bin";
+-   for Object_Dir use "../obj/mains";
++   for Object_Dir use "obj-mains";
+ 
+    for Main use (
+       "gnat_compare.adb", "nameres.adb", "navigate.adb", "parse.adb"
diff --git a/utils/release.sh b/utils/release.sh
new file mode 100755
index 000000000..fb461318c
--- /dev/null
+++ b/utils/release.sh
@@ -0,0 +1,46 @@
+#! /bin/sh
+
+set -e
+
+RELEASE=21.0.0
+SRC_PKG=/tmp/libadalang-$RELEASE.tar.gz
+
+# Make sure the appropriate Langkit sources are checked out in
+# /tmp/langkit-$RELEASE and Libadalang sources in /tmp/lal-$RELEASE
+SRC_DIR=/tmp/lal-$RELEASE
+cd $SRC_DIR
+export PYTHONPATH=/tmp/langkit-$RELEASE:$PYTHONPATH
+
+BUILD_DIR=/tmp/libadalang-$RELEASE
+rm -rf $BUILD_DIR
+
+# Generate the Libadalang and Mains projects
+ada/manage.py --build-dir=$BUILD_DIR --no-langkit-support generate
+
+# Reorganize the trees for libadalang.gpr
+mv $BUILD_DIR/lib/gnat/libadalang.gpr $BUILD_DIR/
+patch -d $BUILD_DIR -p0 -f -i $SRC_DIR/utils/libadalang.gpr.patch
+
+mv $BUILD_DIR/include/libadalang.h $BUILD_DIR/src/
+mv $BUILD_DIR/include/libadalang/*.ad* $BUILD_DIR/src/
+mv $BUILD_DIR/include/libadalang/*.c $BUILD_DIR/src/
+cp -a $SRC_DIR/ada/extensions/src/* $BUILD_DIR/src/
+
+# Reorganize the trees for mains.gpr
+mv $BUILD_DIR/src/mains.gpr $BUILD_DIR/
+patch -d $BUILD_DIR -p0 -f -i $SRC_DIR/utils/mains.gpr.patch
+
+mkdir $BUILD_DIR/src-mains
+mv $BUILD_DIR/src/parse.adb $BUILD_DIR/src-mains/
+cp -ar $SRC_DIR/ada/testsuite/ada/*.ad* $BUILD_DIR/src-mains/
+cp -ar $SRC_DIR/ada/testsuite/ada/gnat_compare/*.ad* $BUILD_DIR/src-mains/
+
+mv $BUILD_DIR/bin/lal_playground $BUILD_DIR/python
+rm -r $BUILD_DIR/bin
+rm -r $BUILD_DIR/include
+rm -r $BUILD_DIR/lib
+rm -r $BUILD_DIR/obj
+
+# Create the release tarball
+tar czf $SRC_PKG -C /tmp libadalang-$RELEASE
+sha512sum $SRC_PKG