diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d28e4167cb0..bf8da3b0761 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -96,7 +96,7 @@ jobs:
           git config user.name "CI"
       - run: |
           sudo apt-get update
-          sudo apt-get install clang mold ccache build-essential cmake ninja-build pkgconf python3-zmq libevent-dev libboost-dev libsqlite3-dev systemtap-sdt-dev libzmq3-dev qt6-base-dev qt6-tools-dev qt6-l10n-tools libqrencode-dev capnproto libcapnp-dev -y
+          sudo apt-get install clang mold ccache build-essential cmake ninja-build pkgconf python3-zmq libboost-dev libsqlite3-dev systemtap-sdt-dev libzmq3-dev qt6-base-dev qt6-tools-dev qt6-l10n-tools libqrencode-dev capnproto libcapnp-dev -y
           sudo pip3 install --break-system-packages pycapnp
       - name: Compile and run tests
         run: |
@@ -159,7 +159,7 @@ jobs:
         run: |
           # A workaround for "The `brew link` step did not complete successfully" error.
           brew install --quiet python@3 || brew link --overwrite python@3
-          brew install --quiet coreutils ninja pkgconf ccache boost libevent zeromq qt@6 qrencode capnp
+          brew install --quiet coreutils ninja pkgconf ccache boost zeromq qt@6 qrencode capnp
 
       - name: Set Ccache directory
         run: echo "CCACHE_DIR=${RUNNER_TEMP}/ccache_dir" >> "$GITHUB_ENV"
diff --git a/ci/test/00_setup_env_native_asan.sh b/ci/test/00_setup_env_native_asan.sh
index 58be89fa104..7e28b05e0b0 100755
--- a/ci/test/00_setup_env_native_asan.sh
+++ b/ci/test/00_setup_env_native_asan.sh
@@ -20,7 +20,7 @@ fi
 
 export CONTAINER_NAME=ci_native_asan
 export APT_LLVM_V="22"
-export PACKAGES="systemtap-sdt-dev clang-${APT_LLVM_V} llvm-${APT_LLVM_V} libclang-rt-${APT_LLVM_V}-dev mold python3-zmq qt6-base-dev qt6-tools-dev qt6-l10n-tools libevent-dev libboost-dev libzmq3-dev libqrencode-dev libsqlite3-dev ${BPFCC_PACKAGE} libcapnp-dev capnproto python3-pip"
+export PACKAGES="systemtap-sdt-dev clang-${APT_LLVM_V} llvm-${APT_LLVM_V} libclang-rt-${APT_LLVM_V}-dev mold python3-zmq qt6-base-dev qt6-tools-dev qt6-l10n-tools libboost-dev libzmq3-dev libqrencode-dev libsqlite3-dev ${BPFCC_PACKAGE} libcapnp-dev capnproto python3-pip"
 export PIP_PACKAGES="--break-system-packages pycapnp"
 export NO_DEPENDS=1
 export GOAL="install"
diff --git a/ci/test/00_setup_env_native_fuzz.sh b/ci/test/00_setup_env_native_fuzz.sh
index 276ce08d056..bb203a72850 100755
--- a/ci/test/00_setup_env_native_fuzz.sh
+++ b/ci/test/00_setup_env_native_fuzz.sh
@@ -9,7 +9,7 @@ export LC_ALL=C.UTF-8
 export CI_IMAGE_NAME_TAG="mirror.gcr.io/ubuntu:26.04"
 export CONTAINER_NAME=ci_native_fuzz
 export APT_LLVM_V="22"
-export PACKAGES="clang-${APT_LLVM_V} llvm-${APT_LLVM_V} libclang-rt-${APT_LLVM_V}-dev libevent-dev libboost-dev libsqlite3-dev libcapnp-dev capnproto"
+export PACKAGES="clang-${APT_LLVM_V} llvm-${APT_LLVM_V} libclang-rt-${APT_LLVM_V}-dev libboost-dev libsqlite3-dev libcapnp-dev capnproto"
 export NO_DEPENDS=1
 export RUN_UNIT_TESTS=false
 export RUN_FUNCTIONAL_TESTS=false
diff --git a/ci/test/00_setup_env_native_fuzz_with_valgrind.sh b/ci/test/00_setup_env_native_fuzz_with_valgrind.sh
index 8020ea43da7..b6442c78fb8 100755
--- a/ci/test/00_setup_env_native_fuzz_with_valgrind.sh
+++ b/ci/test/00_setup_env_native_fuzz_with_valgrind.sh
@@ -8,7 +8,7 @@ export LC_ALL=C.UTF-8
 
 export CI_IMAGE_NAME_TAG="mirror.gcr.io/ubuntu:26.04"
 export CONTAINER_NAME=ci_native_fuzz_valgrind
-export PACKAGES="clang llvm libclang-rt-dev libevent-dev libboost-dev libsqlite3-dev valgrind libcapnp-dev capnproto"
+export PACKAGES="clang llvm libclang-rt-dev libboost-dev libsqlite3-dev valgrind libcapnp-dev capnproto"
 export NO_DEPENDS=1
 export RUN_UNIT_TESTS=false
 export RUN_FUNCTIONAL_TESTS=false
diff --git a/ci/test/00_setup_env_native_iwyu.sh b/ci/test/00_setup_env_native_iwyu.sh
index 3a26be56e7e..14c367bb31c 100755
--- a/ci/test/00_setup_env_native_iwyu.sh
+++ b/ci/test/00_setup_env_native_iwyu.sh
@@ -10,7 +10,7 @@ export CI_IMAGE_NAME_TAG="mirror.gcr.io/ubuntu:26.04"  # To build codegen, CMake
 export CONTAINER_NAME=ci_native_iwyu
 export IWYU_LLVM_V="22"
 export APT_LLVM_V="${IWYU_LLVM_V}"
-export PACKAGES="clang-${IWYU_LLVM_V} clang-format-${IWYU_LLVM_V} libclang-${IWYU_LLVM_V}-dev llvm-${IWYU_LLVM_V}-dev jq libevent-dev libboost-dev libzmq3-dev systemtap-sdt-dev qt6-base-dev qt6-tools-dev qt6-l10n-tools libqrencode-dev libsqlite3-dev libcapnp-dev capnproto"
+export PACKAGES="clang-${IWYU_LLVM_V} clang-format-${IWYU_LLVM_V} libclang-${IWYU_LLVM_V}-dev llvm-${IWYU_LLVM_V}-dev jq libboost-dev libzmq3-dev systemtap-sdt-dev qt6-base-dev qt6-tools-dev qt6-l10n-tools libqrencode-dev libsqlite3-dev libcapnp-dev capnproto"
 export NO_DEPENDS=1
 export RUN_UNIT_TESTS=false
 export RUN_FUNCTIONAL_TESTS=false
diff --git a/ci/test/00_setup_env_native_tidy.sh b/ci/test/00_setup_env_native_tidy.sh
index 5cebb8cd8ca..845a43705b7 100755
--- a/ci/test/00_setup_env_native_tidy.sh
+++ b/ci/test/00_setup_env_native_tidy.sh
@@ -10,7 +10,7 @@ export CI_IMAGE_NAME_TAG="mirror.gcr.io/ubuntu:26.04"
 export CONTAINER_NAME=ci_native_tidy
 export TIDY_LLVM_V="22"
 export APT_LLVM_V="${TIDY_LLVM_V}"
-export PACKAGES="clang-${TIDY_LLVM_V} libclang-${TIDY_LLVM_V}-dev llvm-${TIDY_LLVM_V}-dev libomp-${TIDY_LLVM_V}-dev clang-tidy-${TIDY_LLVM_V} jq libevent-dev libboost-dev libzmq3-dev systemtap-sdt-dev qt6-base-dev qt6-tools-dev qt6-l10n-tools libqrencode-dev libsqlite3-dev libcapnp-dev capnproto"
+export PACKAGES="clang-${TIDY_LLVM_V} libclang-${TIDY_LLVM_V}-dev llvm-${TIDY_LLVM_V}-dev libomp-${TIDY_LLVM_V}-dev clang-tidy-${TIDY_LLVM_V} jq libboost-dev libzmq3-dev systemtap-sdt-dev qt6-base-dev qt6-tools-dev qt6-l10n-tools libqrencode-dev libsqlite3-dev libcapnp-dev capnproto"
 export NO_DEPENDS=1
 export RUN_UNIT_TESTS=false
 export RUN_FUNCTIONAL_TESTS=false
diff --git a/ci/test/00_setup_env_native_valgrind.sh b/ci/test/00_setup_env_native_valgrind.sh
index ba9d5b404aa..52b5a37bfa3 100755
--- a/ci/test/00_setup_env_native_valgrind.sh
+++ b/ci/test/00_setup_env_native_valgrind.sh
@@ -8,7 +8,7 @@ export LC_ALL=C.UTF-8
 
 export CI_IMAGE_NAME_TAG="mirror.gcr.io/ubuntu:26.04"
 export CONTAINER_NAME=ci_native_valgrind
-export PACKAGES="clang llvm libclang-rt-dev valgrind python3-zmq libevent-dev libboost-dev libzmq3-dev libsqlite3-dev libcapnp-dev capnproto python3-pip"
+export PACKAGES="clang llvm libclang-rt-dev valgrind python3-zmq libboost-dev libzmq3-dev libsqlite3-dev libcapnp-dev capnproto python3-pip"
 export PIP_PACKAGES="--break-system-packages pycapnp"
 export USE_VALGRIND=1
 export NO_DEPENDS=1