diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b1597fc..e63f7b1 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -27,4 +27,4 @@ jobs:
                   cabal-version: latest
             - run: sudo apt install x11-apps
             - run: git clone https://gitlab.freedesktop.org/xorg/proto/xcbproto.git proto && cd proto && git checkout ${{ matrix.xcbver }}
-            - run: make -j XCBDIR=./proto/src check
+            - run: make XCBDIR=./proto/src check
diff --git a/Makefile b/Makefile
index 60c98ba..1665e00 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@ else
 endif
 NCPUS=$(shell grep -c processor /proc/cpuinfo)
 PARALLEL=$(shell which parallel)
-CABAL=flock xcffib.cabal cabal --config-file=./cabal.config
+CABAL=cabal --config-file=./cabal.config
 GEN=$(CABAL) new-run --minimize-conflict-set -j$(NCPUS) exe:xcffibgen --
 VENV=xcffib_venv
 PYTHON=$(VENV)/bin/python3