diff --git a/pkgs/development/compilers/dotnet/build-dotnet.nix b/pkgs/development/compilers/dotnet/build-dotnet.nix
index 3080873bb96a..3ebe6ca40dd4 100644
--- a/pkgs/development/compilers/dotnet/build-dotnet.nix
+++ b/pkgs/development/compilers/dotnet/build-dotnet.nix
@@ -12,6 +12,7 @@ assert builtins.elem type [ "aspnetcore" "runtime" "sdk"];
 , libuuid
 , zlib
 , curl
+, lttng-ust_2_12
 }:
 
 let
@@ -40,14 +41,17 @@ let
 in stdenv.mkDerivation rec {
   inherit pname version;
 
+  # Some of these dependencies are `dlopen()`ed.
   rpath = lib.makeLibraryPath [
+    stdenv.cc.cc
+    lttng-ust_2_12
+    zlib
+
     curl
     icu
     libunwind
     libuuid
     openssl
-    stdenv.cc.cc
-    zlib
   ];
 
   src = fetchurl {
@@ -73,7 +77,7 @@ in stdenv.mkDerivation rec {
     patchelf --set-interpreter "${stdenv.cc.bintools.dynamicLinker}" $out/dotnet
     patchelf --set-rpath "${rpath}" $out/dotnet
     find $out -type f -name "*.so" -exec patchelf --set-rpath '$ORIGIN:${rpath}' {} \;
-    find $out -type f -name "apphost" -exec patchelf --set-interpreter "${stdenv.cc.bintools.dynamicLinker}" --set-rpath '$ORIGIN:${rpath}' {} \;
+    find $out -type f \( -name "apphost" -or -name "createdump" \) -exec patchelf --set-interpreter "${stdenv.cc.bintools.dynamicLinker}" --set-rpath '$ORIGIN:${rpath}' {} \;
   '';
 
   doInstallCheck = true;
diff --git a/pkgs/development/tools/misc/lttng-ust/2.12.nix b/pkgs/development/tools/misc/lttng-ust/2.12.nix
new file mode 100644
index 000000000000..b3ef1fe65e7f
--- /dev/null
+++ b/pkgs/development/tools/misc/lttng-ust/2.12.nix
@@ -0,0 +1,4 @@
+import ./generic.nix {
+  version = "2.12.2";
+  sha256 = "sha256-vNDwZLbKiMcthOdg6sNHKuXIKEEcY0Q1kivun841n8c=";
+}
diff --git a/pkgs/development/tools/misc/lttng-ust/default.nix b/pkgs/development/tools/misc/lttng-ust/default.nix
index 244d6442c15f..3bace16de56d 100644
--- a/pkgs/development/tools/misc/lttng-ust/default.nix
+++ b/pkgs/development/tools/misc/lttng-ust/default.nix
@@ -1,42 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, liburcu, numactl, python3 }:
-
-# NOTE:
-#   ./configure ...
-#   [...]
-#   LTTng-UST will be built with the following options:
-#
-#   Java support (JNI): Disabled
-#   sdt.h integration:  Disabled
-#   [...]
-#
-# Debian builds with std.h (systemtap).
-
-stdenv.mkDerivation rec {
-  pname = "lttng-ust";
-  version = "2.13.0";
-
-  src = fetchurl {
-    url = "https://lttng.org/files/lttng-ust/${pname}-${version}.tar.bz2";
-    sha256 = "0l0p6y2zrd9hgd015dhafjmpcj7waz762n6wf5ws1xlwcwrwkr2l";
-  };
-
-  nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ numactl python3 ];
-
-  preConfigure = ''
-    patchShebangs .
-  '';
-
-  propagatedBuildInputs = [ liburcu ];
-
-  enableParallelBuilding = true;
-
-  meta = with lib; {
-    description = "LTTng Userspace Tracer libraries";
-    homepage = "https://lttng.org/";
-    license = with licenses; [ lgpl21Only gpl2Only mit ];
-    platforms = platforms.linux;
-    maintainers = [ maintainers.bjornfor ];
-  };
-
+import ./generic.nix {
+  version = "2.13.1";
+  sha256 = "sha256-Vme/Amnh5i4tnLl0xFb/huBAG9eqO/yNX9uXIzJJ7dw=";
 }
diff --git a/pkgs/development/tools/misc/lttng-ust/generic.nix b/pkgs/development/tools/misc/lttng-ust/generic.nix
new file mode 100644
index 000000000000..e6e67352c859
--- /dev/null
+++ b/pkgs/development/tools/misc/lttng-ust/generic.nix
@@ -0,0 +1,44 @@
+{ version, sha256 }:
+
+{ lib, stdenv, fetchurl, pkg-config, liburcu, numactl, python3 }:
+
+# NOTE:
+#   ./configure ...
+#   [...]
+#   LTTng-UST will be built with the following options:
+#
+#   Java support (JNI): Disabled
+#   sdt.h integration:  Disabled
+#   [...]
+#
+# Debian builds with std.h (systemtap).
+
+stdenv.mkDerivation rec {
+  pname = "lttng-ust";
+  inherit version;
+
+  src = fetchurl {
+    url = "https://lttng.org/files/lttng-ust/${pname}-${version}.tar.bz2";
+    inherit sha256;
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ numactl python3 ];
+
+  preConfigure = ''
+    patchShebangs .
+  '';
+
+  propagatedBuildInputs = [ liburcu ];
+
+  enableParallelBuilding = true;
+
+  meta = with lib; {
+    description = "LTTng Userspace Tracer libraries";
+    homepage = "https://lttng.org/";
+    license = with licenses; [ lgpl21Only gpl2Only mit ];
+    platforms = platforms.linux;
+    maintainers = [ maintainers.bjornfor ];
+  };
+
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 828d4f53b755..86e07bb5fa20 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14946,6 +14946,8 @@ with pkgs;
 
   lttng-ust = callPackage ../development/tools/misc/lttng-ust { };
 
+  lttng-ust_2_12 = callPackage ../development/tools/misc/lttng-ust/2.12.nix { };
+
   lttv = callPackage ../development/tools/misc/lttv { };
 
   luaformatter = callPackage ../development/tools/luaformatter