diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c3e01f45..16511e90 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,7 +23,9 @@ stages:
   - deploy
 
 before_script:
-  - echo "deb http://deb.debian.org/debian/ experimental main" > /etc/apt/sources.list.d/experimental.list
+# Workaround for unavailable dependencies
+  - mv debian/control.debian-testing debian/control
+# End of workaround for unavailable dependencies
   - apt-get -y update
   - apt-get -y install ca-certificates
 
@@ -46,7 +48,6 @@ build_meson:
       - _build
     expire_in: 3h
   script:
-    - apt-get -y install -t experimental librust-serde-yaml-dev
     - apt-get -y build-dep .
     - meson . _build/ -Ddepdatadir=/usr/share -Dfind_orphans=true --werror
     - ninja -C _build install
@@ -63,9 +64,18 @@ build_deb:
       - '*.deb'
   script:
     - rm -f ../*.deb
-    - apt-get -y install -t experimental librust-serde-yaml-dev
     - apt-get -y build-dep .
     - apt-get -y install devscripts
+# Workaround for unavailable dependencies
+# TODO: Port Squeekboard to GTK4/GTK4-layer-shell
+# https://gitlab.gnome.org/World/Phosh/squeekboard/-/issues/64
+    - echo "deb http://deb.debian.org/debian/ unstable main" > /etc/apt/sources.list.d/unstable.list
+    - echo "deb http://deb.debian.org/debian/ experimental main" > /etc/apt/sources.list.d/experimental.list
+    - apt-get -y update
+    - apt-get -y --no-upgrade install librust-gio-dev librust-glib-dev librust-glib-sys-dev
+      librust-gtk-dev librust-gtk-sys-dev
+    - apt-get -y --no-upgrade install -t experimental librust-serde-yaml-dev
+# End of workaround for unavailable dependencies
     - REV=$(git log -1 --format=%h)
     - VER=$(dpkg-parsechangelog -SVersion)
     - DEBFULLNAME="Librem5 CI"
@@ -83,7 +93,6 @@ build_reference:
     paths:
       - _build/doc
   script:
-    - apt-get -y install -t experimental librust-serde-yaml-dev
     - apt-get -y build-dep .
     - apt-get -y install cargo
     - cd _build
@@ -98,7 +107,6 @@ test:
     - job: build_meson
       artifacts: true
   script:
-    - apt-get -y install -t experimental librust-serde-yaml-dev
     - apt-get -y build-dep .
     - apt-get -y install clang-tidy
     - ninja -C _build test
@@ -111,7 +119,6 @@ test_style:
   stage: test
   needs: []
   script:
-    - apt-get -y install -t experimental librust-serde-yaml-dev
     - apt-get -y build-dep .
     - tools/style-check_source
   except:
diff --git a/debian/control.debian-testing b/debian/control.debian-testing
new file mode 100644
index 00000000..ac719bf9
--- /dev/null
+++ b/debian/control.debian-testing
@@ -0,0 +1,71 @@
+Source: squeekboard
+Section: x11
+Priority: optional
+Maintainer: Dorota Czaplejewicz <dorota.czaplejewicz@puri.sm>
+Build-Depends:
+ cargo,
+ debhelper-compat (= 13),
+ meson (>=0.51.0),
+ ninja-build,
+ pkg-config,
+ libbsd-dev,
+ libfeedback-dev,
+ libglib2.0-dev,
+ libgnome-desktop-3-dev,
+ libgtk-3-dev,
+ librust-aho-corasick-dev,
+ librust-bitflags-1-dev (>= 1.0),
+ librust-clap-4+std-dev (>= 4.0),
+# TODO: Port to GTK4/GTK4-layer-shell
+# https://gitlab.gnome.org/World/Phosh/squeekboard/-/issues/64
+# These dependencies have been removed from Debian Testing.
+# Building with dependencies from "crates.io" still works without these.
+# librust-gio+v2-58-dev (>= 0.18),
+# librust-glib+v2-58-dev (>= 0.18),
+# librust-glib-sys-dev (>= 0.18),
+# librust-gtk+v3-24-dev (>= 0.18),
+# librust-gtk-sys-dev (>= 0.18),
+ librust-maplit-1-dev (>= 1.0),
+ librust-serde-derive-1-dev (>= 1.0),
+# Currently in Debian Experimental
+# librust-serde-yaml-0.9-dev (>= 0.9),
+ librust-thread-local-dev,
+ librust-xkbcommon-dev (>= 0.5),
+ librust-zbus-1-dev (>= 1.9),
+ librust-zvariant-2-dev (>= 2.10),
+ librust-zvariant-derive-2-dev (>= 2.10),
+ libwayland-dev (>= 1.16),
+ lsb-release,
+ python3,
+ python3-ruamel.yaml,
+ rustc,
+ wayland-protocols (>= 1.14),
+Standards-Version: 4.1.3
+Homepage: https://gitlab.gnome.org/World/Phosh/squeekboard
+
+Package: squeekboard
+Architecture: linux-any
+Depends:
+# for Greek polytonic readability
+ fonts-gfs-didot-classic,
+# for the Adwaita-dark theme
+ gnome-themes-extra-data,
+ ${shlibs:Depends},
+ ${misc:Depends},
+Breaks:
+ librem5-base (<< 24),
+Description: On-screen keyboard for Wayland
+ Virtual keyboard supporting Wayland, built primarily for the Librem 5 phone.
+
+Package: squeekboard-devel
+Architecture: linux-any
+Depends:
+ python3,
+ python3-gi,
+ ${shlibs:Depends},
+ ${misc:Depends},
+Description: Resources for making Squeekboard layouts
+ Tools for creating and testing Squeekboard layouts:
+ .
+  * squeekboard-entry
+  * squeekboard-test-layout
diff --git a/doc/hacking.md b/doc/hacking.md
index eb32c452..0950a164 100644
--- a/doc/hacking.md
+++ b/doc/hacking.md
@@ -58,6 +58,12 @@ sudo apt-get -y build-dep .
 
 For an explicit list of dependencies check the `Build-Depends` entry in the [`debian/control`](debian/control) file.
 
+Note: Some build-dependencies are currently unavailable in Debian Testing.
+To be able to install the build-dependencies with the previously mentioned commands anyway,
+rename `control` in the `debian`-folder to `control.original`,
+and `control.debian-testing` to `control` before using those commands.
+The remaining dependencies will then be downloaded by `cargo` when building Squeekboard.
+
 Testing
 -------