diff --git a/.evergreen/config.yml b/.evergreen/config.yml
index 5fdbdbb9c..23ef2c27e 100755
--- a/.evergreen/config.yml
+++ b/.evergreen/config.yml
@@ -463,7 +463,7 @@ tasks:
   - func: "fetch source"
   - func: "earthly"
     vars:
-      args: +create-deb-packages-and-repos --env=${earthly_env} --packager_distro=${packager_distro} --packager_arch=${packager_arch}
+      args: +create-deb-packages-and-repos --env=${earthly_env} --packager_distro=${packager_distro} --packager_arch=${packager_arch} --ninja_version=${ninja_version}
   - func: "upload packages and repos"
 
 - name: publish-deb-packages-with-earthly
@@ -675,6 +675,8 @@ tasks:
       name: build-and-test-and-upload
     - variant: amazon2023-arm64
       name: build-and-test-and-upload
+    - variant: debian13
+      name: build-and-test-and-upload
     - variant: debian12
       name: build-and-test-and-upload
     - variant: debian11
@@ -752,6 +754,8 @@ tasks:
       vars: { variant_name: "amazon2023" }
     - func: "download tarball"
       vars: { variant_name: "amazon2023-arm64" }
+    - func: "download tarball"
+      vars: { variant_name: "debian13" }
     - func: "download tarball"
       vars: { variant_name: "debian12" }
     - func: "download tarball"
@@ -1294,6 +1298,18 @@ buildvariants:
   - name: publish-packages
     distros:
     - ubuntu2004-small
+- name: debian13
+  display_name: "Debian 13"
+  run_on: debian13-m6i-xlarge
+  expansions:
+    has_packages: true
+    packager_distro: debian13
+    packager_arch: x86_64
+  tasks:
+  - build-and-test-and-upload
+  - name: publish-packages
+    distros:
+    - ubuntu2004-small
 - name: debian12
   display_name: "Debian 12"
   run_on: debian12-large
@@ -1682,6 +1698,22 @@ buildvariants:
     # Use a distro suitable for running curator to publish .deb packages.
     run_on: ubuntu2004-small
 
+- name: debian13-arm64-earthly
+  display_name: "Debian 13 arm64 (via Earthly)"
+  expansions:
+    has_packages: true
+    packager_distro: debian13
+    packager_arch: arm64
+    earthly_env: deb13
+    ninja_version: 1.12.1
+  tasks:
+  - name: build-deb-packages-with-earthly
+    # Use an arm64 distro to match the intended target architecture of .deb packages.
+    run_on: ubuntu2204-arm64-small
+  - name: publish-deb-packages-with-earthly
+    # Use a distro suitable for running curator to publish .deb packages.
+    run_on: ubuntu2004-small
+
 - name: debian12-arm64-earthly
   display_name: "Debian 12 arm64 (via Earthly)"
   expansions:
diff --git a/Earthfile b/Earthfile
index 81dd38569..45e4d8ed1 100644
--- a/Earthfile
+++ b/Earthfile
@@ -47,6 +47,7 @@
     #   • deb10 - Debian 10.0
     #   • deb11 - Debian 11.0
     #   • deb12 - Debian 12.0
+    #   • deb13 - Debian 13
     #   • sles15 - OpenSUSE Leap 15.0
     #   • alpine - Alpine Linux 3.18
     #
@@ -214,6 +215,10 @@ env.deb12:
     # A Debian 12.0 environment
     DO +ENV_DEBIAN --version 12.0
 
+env.deb13:
+    # A Debian 13 environment
+    DO +ENV_DEBIAN --version 13.0
+
 env.sles15:
     # An OpenSUSE Leap 15.0 environment.
     FROM +init --base=opensuse/leap:15.0
@@ -235,6 +240,8 @@ CACHE_WARMUP:
          .evergreen/ensure-ninja.sh \
          /T/
     RUN bash /T/ensure-cmake.sh
+    ARG ninja_version
+    ENV NINJA_VERSION=$ninja_version
     RUN env NINJA_EXE=/usr/local/bin/ninja \
         bash /T/ensure-ninja.sh
 
@@ -415,7 +422,8 @@ build:
 create-deb-packages-and-repos:
     ARG env
     FROM +env.$env
-    DO +CACHE_WARMUP
+    ARG ninja_version
+    DO +CACHE_WARMUP --ninja_version=$ninja_version
     DO +COPY_SOURCE
     WORKDIR /s
     RUN __install dh-make dpkg-dev apt-utils
diff --git a/README.md b/README.md
index dfcd4994f..fe96f2258 100644
--- a/README.md
+++ b/README.md
@@ -150,7 +150,7 @@ Second, create a list entry for the repository.  For Ubuntu systems (be sure to
 echo "deb https://libmongocrypt.s3.amazonaws.com/apt/ubuntu <release>/libmongocrypt/1.17 universe" | sudo tee /etc/apt/sources.list.d/libmongocrypt.list
 ```
 
-For Debian systems (be sure to change `<release>` to `stretch`, `buster`, `bullseye`, or `bookworm` as appropriate to your system):
+For Debian systems (be sure to change `<release>` to `stretch`, `buster`, `bullseye`, `bookworm`, or `trixie` as appropriate to your system):
 
 ```
 echo "deb https://libmongocrypt.s3.amazonaws.com/apt/debian <release>/libmongocrypt/1.17 main" | sudo tee /etc/apt/sources.list.d/libmongocrypt.list
diff --git a/etc/packager.py b/etc/packager.py
index ce8e8c5a8..51e7e8341 100755
--- a/etc/packager.py
+++ b/etc/packager.py
@@ -342,6 +342,8 @@ def repo_os_version(self, build_os):
                 return 'bullseye'
             elif build_os == 'debian12':
                 return 'bookworm'
+            elif build_os == 'debian13':
+                return 'trixie'
             else:
                 raise Exception("unsupported build_os: %s" % build_os)
         else:
@@ -395,7 +397,7 @@ def build_os(self, arch):
                 "ubuntu2404",
             ]
         elif self.dname == 'debian':
-            return ["debian81", "debian92", "debian10", "debian11", "debian12"]
+            return ["debian81", "debian92", "debian10", "debian11", "debian12", "debian13"]
         else:
             raise Exception("BUG: unsupported platform?")