diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index c41b8f1..ccc01c0 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -39,7 +39,7 @@ jobs:
       - name: Build Files
         id: build_files
         if: steps.pull_container_image.outcome == 'success'
-        run: make -j$(nproc)
+        run: make
 
       - name: Upload central-execution-engine-spec.pdf
         if: steps.build_files.outcome == 'success'
diff --git a/Makefile b/Makefile
index c0e0dbe..48680a8 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,8 @@
-# Taken and adapted from https://github.com/riscv/riscv-isa-manual/blob/main/Makefile
 # vim: noexpandtab:tabstop=4:shiftwidth=4
 
+# Taken and adapted from https://github.com/riscv/riscv-isa-manual/blob/main/Makefile
+# Adapted to run in Gitea Actions: https://gitea.com/gitea/act_runner/issues/189#issuecomment-812870
+
 DOCS := central-execution-engine-spec
 
 DOCKER_IMG_BASE := git.elyanpoujol.fr/elyan
@@ -16,31 +18,26 @@ REQUIRES := --require=asciidoctor-diagram
 
 DOCKER_IS_ROOTLESS = \
     $(shell ! ps ux | grep -v grep | grep dockerd-rootless >/dev/null ; echo $$?)
-ifneq "$(DOCKER_IS_ROOTLESS)" "1"
+
+VOLUME_LOCAL := -v $(PWD):$(PWD)
+VOLUME_CI := --volumes-from=$(JOB_CONTAINER_NAME)
+
+ifeq "$(CI)" "true"
+    VOLUME := VOLUME_CI
+    $(info Running in a CI environment)
+else ifneq "$(DOCKER_IS_ROOTLESS)" "1"
     # Rooted Docker requires this flag so that the files it creates are
     # owned by the current user instead of root. Rootless docker does not
     # require it, and Podman doesn't either since it is always rootless.
     DOCKER_USER_ARG := --user $(shell id -u)
     SUDO_PREFIX := sudo
+    VOLUME := $(VOLUME_LOCAL)
+    $(info Running locally)
+else
+    VOLUME := $(VOLUME_LOCAL)
+    $(info Running locally in rootless mode)
 endif
 
-DOCKER_CMD = \
-$(SUDO_PREFIX) docker run --rm \
-    -v $(PWD)/$@.workdir:/build \
-    -w /build \
-	$(DOCKER_USER_ARG) \
-    $(DOCKER_IMG) \
-    /bin/sh -c
-
-WORKDIR_SETUP = \
-    rm -rf $@.workdir && \
-    mkdir -p $@.workdir && \
-    cp -r src $@.workdir
-
-WORKDIR_TEARDOWN = \
-    mv $@.workdir/$@ $@ && \
-    rm -rf $@.workdir
-
 SRC_DIR    := src
 BUILD_DIR  := build
 DOCKER_DIR := docker
@@ -48,18 +45,26 @@ DOCKER_DIR := docker
 ALL_SRC  := $(shell find $(SRC_DIR) -type f -name '*.adoc' -print)
 DOCS_PDF := $(addprefix $(BUILD_DIR)/, $(addsuffix .pdf, $(DOCS)))
 
-.PHONY: all build create-docker-image clean
+.PHONY: all build build-in-docker image clean
 
-all: build-pdf
+all: build
 
-build-pdf: $(DOCS_PDF)
+build:
+	$(SUDO_PREFIX) docker run --rm $(VOLUME) $(DOCKER_USER_ARG) $(DOCKER_IMG) /bin/sh -c "cd $(PWD) && make build-in-docker"
+
+build-in-docker: $(DOCS_PDF)
 
 $(BUILD_DIR)/%.pdf: $(SRC_DIR)/%.adoc $(ALL_SRC)
-	$(WORKDIR_SETUP)
-	$(DOCKER_CMD) '$(ENV) asciidoctor-pdf $(OPTIONS) $(REQUIRES) $<'
-	$(WORKDIR_TEARDOWN)
+	@echo "Building documentation in docker container..."
+	rm -rf $@.workdir
+	mkdir -p $@.workdir
+	cp -r src $@.workdir
+	$(ENV) cd $@.workdir && asciidoctor-pdf $(OPTIONS) $(REQUIRES) $<
+	mv $@.workdir/$@ $@
+	rm -rf $@.workdir
+	@echo "Build completed."
 
-create-docker-image:
+image:
 	$(SUDO_PREFIX) docker build -t $(DOCKER_IMG) $(DOCKER_DIR)
 
 clean: