1 files changed, 31 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/libraries/olm/default.nix b/nixpkgs/pkgs/development/libraries/olm/default.nix
new file mode 100644
index 000000000000..bb7553c2eb3e
--- /dev/null
+++ b/nixpkgs/pkgs/development/libraries/olm/default.nix
@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchFromGitLab, cmake }:
+
+stdenv.mkDerivation rec {
+  pname = "olm";
+  version = "3.2.16";
+
+  src = fetchFromGitLab {
+    domain = "gitlab.matrix.org";
+    owner = "matrix-org";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-JX20mpuLO+UoNc8iQlXEHAbH9sfblkBbM1gE27Ve0ac=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  doCheck = true;
+
+  postPatch = ''
+    substituteInPlace olm.pc.in \
+      --replace '$'{exec_prefix}/@CMAKE_INSTALL_LIBDIR@ @CMAKE_INSTALL_FULL_LIBDIR@ \
+      --replace '$'{prefix}/@CMAKE_INSTALL_INCLUDEDIR@ @CMAKE_INSTALL_FULL_INCLUDEDIR@
+  '';
+
+  meta = with lib; {
+    description = "Implements double cryptographic ratchet and Megolm ratchet";
+    homepage = "https://gitlab.matrix.org/matrix-org/olm";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ tilpner oxzi ];
+  };
+}