diff --git a/libs/cli/langgraph_cli/config.py b/libs/cli/langgraph_cli/config.py
index f90ed3a12..cdbf6ee8e 100644
--- a/libs/cli/langgraph_cli/config.py
+++ b/libs/cli/langgraph_cli/config.py
@@ -223,13 +223,15 @@ def config_to_docker(config_path: pathlib.Path, config: Config, base_image: str)
     # https://til.simonwillison.net/python/pyproject
     faux_pkgs_str = f"{os.linesep}{os.linesep}".join(
         f"""ADD {relpath} {destpath}
-COPY <<EOF /deps/__outer_{fullpath.name}/pyproject.toml
-[project]
-name = "{fullpath.name}"
-version = "0.1"
-[tool.setuptools.package-data]
-"*" = ["**/*"]
-EOF"""
+RUN set -ex && \\
+    for line in '[project]' \\
+                'name = "{fullpath.name}"' \\
+                'version = "0.1"' \\
+                '[tool.setuptools.package-data]' \\
+                '"*" = ["**/*"]'; do \\
+        echo "$line" >> /deps/__outer_{fullpath.name}/pyproject.toml; \\
+    done
+"""
         for fullpath, (relpath, destpath) in local_deps.faux_pkgs.items()
     )
     local_pkgs_str = os.linesep.join(
diff --git a/libs/cli/tests/unit_tests/test_config.py b/libs/cli/tests/unit_tests/test_config.py
index c47b36e7b..f50eee96c 100644
--- a/libs/cli/tests/unit_tests/test_config.py
+++ b/libs/cli/tests/unit_tests/test_config.py
@@ -73,13 +73,14 @@ def test_config_to_docker_simple():
     expected_docker_stdin = """\
 FROM langchain/langgraph-api:3.11
 ADD . /deps/__outer_unit_tests/unit_tests
-COPY <<EOF /deps/__outer_unit_tests/pyproject.toml
-[project]
-name = "unit_tests"
-version = "0.1"
-[tool.setuptools.package-data]
-"*" = ["**/*"]
-EOF
+RUN set -ex && \\
+    for line in '[project]' \\
+                'name = "unit_tests"' \\
+                'version = "0.1"' \\
+                '[tool.setuptools.package-data]' \\
+                '"*" = ["**/*"]'; do \\
+        echo "$line" >> /deps/__outer_unit_tests/pyproject.toml; \\
+    done
 RUN pip install -c /api/constraints.txt -e /deps/*
 ENV LANGSERVE_GRAPHS='{"agent": "/deps/__outer_unit_tests/unit_tests/agent.py:graph"}'
 WORKDIR /deps/__outer_unit_tests/unit_tests\
@@ -104,13 +105,14 @@ def test_config_to_docker_pipconfig():
 FROM langchain/langgraph-api:3.11
 ADD pipconfig.txt /pipconfig.txt
 ADD . /deps/__outer_unit_tests/unit_tests
-COPY <<EOF /deps/__outer_unit_tests/pyproject.toml
-[project]
-name = "unit_tests"
-version = "0.1"
-[tool.setuptools.package-data]
-"*" = ["**/*"]
-EOF
+RUN set -ex && \\
+    for line in '[project]' \\
+                'name = "unit_tests"' \\
+                'version = "0.1"' \\
+                '[tool.setuptools.package-data]' \\
+                '"*" = ["**/*"]'; do \\
+        echo "$line" >> /deps/__outer_unit_tests/pyproject.toml; \\
+    done
 RUN PIP_CONFIG_FILE=/pipconfig.txt pip install -c /api/constraints.txt -e /deps/*
 ENV LANGSERVE_GRAPHS='{"agent": "/deps/__outer_unit_tests/unit_tests/agent.py:graph"}'
 WORKDIR /deps/__outer_unit_tests/unit_tests\
@@ -153,13 +155,14 @@ def test_config_to_docker_local_deps():
     expected_docker_stdin = """\
 FROM langchain/langgraph-api-custom:3.11
 ADD ./graphs /deps/__outer_graphs/src
-COPY <<EOF /deps/__outer_graphs/pyproject.toml
-[project]
-name = "graphs"
-version = "0.1"
-[tool.setuptools.package-data]
-"*" = ["**/*"]
-EOF
+RUN set -ex && \\
+    for line in '[project]' \\
+                'name = "graphs"' \\
+                'version = "0.1"' \\
+                '[tool.setuptools.package-data]' \\
+                '"*" = ["**/*"]'; do \\
+        echo "$line" >> /deps/__outer_graphs/pyproject.toml; \\
+    done
 RUN pip install -c /api/constraints.txt -e /deps/*
 ENV LANGSERVE_GRAPHS='{"agent": "/deps/__outer_graphs/src/agent.py:graph"}'\
 """
@@ -216,13 +219,14 @@ ARG foo
 ADD pipconfig.txt /pipconfig.txt
 RUN PIP_CONFIG_FILE=/pipconfig.txt pip install -c /api/constraints.txt langchain langchain_openai
 ADD ./graphs/ /deps/__outer_graphs/src
-COPY <<EOF /deps/__outer_graphs/pyproject.toml
-[project]
-name = "graphs"
-version = "0.1"
-[tool.setuptools.package-data]
-"*" = ["**/*"]
-EOF
+RUN set -ex && \\
+    for line in '[project]' \\
+                'name = "graphs"' \\
+                'version = "0.1"' \\
+                '[tool.setuptools.package-data]' \\
+                '"*" = ["**/*"]'; do \\
+        echo "$line" >> /deps/__outer_graphs/pyproject.toml; \\
+    done
 RUN PIP_CONFIG_FILE=/pipconfig.txt pip install -c /api/constraints.txt -e /deps/*
 ENV LANGSERVE_GRAPHS='{"agent": "/deps/__outer_graphs/src/agent.py:graph"}'"""
     assert clean_empty_lines(actual_docker_stdin) == expected_docker_stdin
@@ -239,13 +243,14 @@ def test_config_to_compose_simple_config():
             dockerfile_inline: |
                 FROM langchain/langgraph-api:3.11
                 ADD . /deps/__outer_unit_tests/unit_tests
-                COPY <<EOF /deps/__outer_unit_tests/pyproject.toml
-                [project]
-                name = "unit_tests"
-                version = "0.1"
-                [tool.setuptools.package-data]
-                "*" = ["**/*"]
-                EOF
+                RUN set -ex && \\
+                    for line in '[project]' \\
+                                'name = "unit_tests"' \\
+                                'version = "0.1"' \\
+                                '[tool.setuptools.package-data]' \\
+                                '"*" = ["**/*"]'; do \\
+                        echo "$line" >> /deps/__outer_unit_tests/pyproject.toml; \\
+                    done
                 RUN pip install -c /api/constraints.txt -e /deps/*
                 ENV LANGSERVE_GRAPHS='{"agent": "/deps/__outer_unit_tests/unit_tests/agent.py:graph"}'
                 WORKDIR /deps/__outer_unit_tests/unit_tests
@@ -268,13 +273,14 @@ def test_config_to_compose_env_vars():
             dockerfile_inline: |
                 FROM langchain/langgraph-api-custom:3.11
                 ADD . /deps/__outer_unit_tests/unit_tests
-                COPY <<EOF /deps/__outer_unit_tests/pyproject.toml
-                [project]
-                name = "unit_tests"
-                version = "0.1"
-                [tool.setuptools.package-data]
-                "*" = ["**/*"]
-                EOF
+                RUN set -ex && \\
+                    for line in '[project]' \\
+                                'name = "unit_tests"' \\
+                                'version = "0.1"' \\
+                                '[tool.setuptools.package-data]' \\
+                                '"*" = ["**/*"]'; do \\
+                        echo "$line" >> /deps/__outer_unit_tests/pyproject.toml; \\
+                    done
                 RUN pip install -c /api/constraints.txt -e /deps/*
                 ENV LANGSERVE_GRAPHS='{"agent": "/deps/__outer_unit_tests/unit_tests/agent.py:graph"}'
                 WORKDIR /deps/__outer_unit_tests/unit_tests
@@ -304,13 +310,14 @@ def test_config_to_compose_env_file():
             dockerfile_inline: |
                 FROM langchain/langgraph-api:3.11
                 ADD . /deps/__outer_unit_tests/unit_tests
-                COPY <<EOF /deps/__outer_unit_tests/pyproject.toml
-                [project]
-                name = "unit_tests"
-                version = "0.1"
-                [tool.setuptools.package-data]
-                "*" = ["**/*"]
-                EOF
+                RUN set -ex && \\
+                    for line in '[project]' \\
+                                'name = "unit_tests"' \\
+                                'version = "0.1"' \\
+                                '[tool.setuptools.package-data]' \\
+                                '"*" = ["**/*"]'; do \\
+                        echo "$line" >> /deps/__outer_unit_tests/pyproject.toml; \\
+                    done
                 RUN pip install -c /api/constraints.txt -e /deps/*
                 ENV LANGSERVE_GRAPHS='{"agent": "/deps/__outer_unit_tests/unit_tests/agent.py:graph"}'
                 WORKDIR /deps/__outer_unit_tests/unit_tests
@@ -333,13 +340,14 @@ def test_config_to_compose_watch():
             dockerfile_inline: |
                 FROM langchain/langgraph-api:3.11
                 ADD . /deps/__outer_unit_tests/unit_tests
-                COPY <<EOF /deps/__outer_unit_tests/pyproject.toml
-                [project]
-                name = "unit_tests"
-                version = "0.1"
-                [tool.setuptools.package-data]
-                "*" = ["**/*"]
-                EOF
+                RUN set -ex && \\
+                    for line in '[project]' \\
+                                'name = "unit_tests"' \\
+                                'version = "0.1"' \\
+                                '[tool.setuptools.package-data]' \\
+                                '"*" = ["**/*"]'; do \\
+                        echo "$line" >> /deps/__outer_unit_tests/pyproject.toml; \\
+                    done
                 RUN pip install -c /api/constraints.txt -e /deps/*
                 ENV LANGSERVE_GRAPHS='{"agent": "/deps/__outer_unit_tests/unit_tests/agent.py:graph"}'
                 WORKDIR /deps/__outer_unit_tests/unit_tests
@@ -375,13 +383,14 @@ def test_config_to_compose_end_to_end():
             dockerfile_inline: |
                 FROM langchain/langgraph-api:3.11
                 ADD . /deps/__outer_unit_tests/unit_tests
-                COPY <<EOF /deps/__outer_unit_tests/pyproject.toml
-                [project]
-                name = "unit_tests"
-                version = "0.1"
-                [tool.setuptools.package-data]
-                "*" = ["**/*"]
-                EOF
+                RUN set -ex && \\
+                    for line in '[project]' \\
+                                'name = "unit_tests"' \\
+                                'version = "0.1"' \\
+                                '[tool.setuptools.package-data]' \\
+                                '"*" = ["**/*"]'; do \\
+                        echo "$line" >> /deps/__outer_unit_tests/pyproject.toml; \\
+                    done
                 RUN pip install -c /api/constraints.txt -e /deps/*
                 ENV LANGSERVE_GRAPHS='{"agent": "/deps/__outer_unit_tests/unit_tests/agent.py:graph"}'
                 WORKDIR /deps/__outer_unit_tests/unit_tests