diff --git a/.spack/repo/packages/csg-eb/package.py b/.spack/repo/packages/csg-eb/package.py
index 56674970281f2b107b1be5295ad4be02887cb47c..b90897bf84878d41dc076ad8439afa58279cca28 100644
--- a/.spack/repo/packages/csg-eb/package.py
+++ b/.spack/repo/packages/csg-eb/package.py
@@ -20,7 +20,7 @@ class CsgEb(CMakePackage):
 
     depends_on("pegtl")
     depends_on("catch2")
-    depends_on("cgal", when="+cgal")
+    depends_on("cgal header_only=True", when="+cgal")
 
     def cmake_args(self):
         return [
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e845572831fa6957bf8c2dab6d7a9c51a9c41448..dc67843029e2d208dd956d4e387b28a13292ff11 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,7 +47,7 @@ install(TARGETS csg-eb
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 )
-export(TARGETS csg-eb
+export(TARGETS csg-eb csg-eb-pi
     NAMESPACE CsgEb::
     FILE "${CMAKE_CURRENT_BINARY_DIR}/CsgEbConfig.cmake"
 )
diff --git a/Dockerfile b/Dockerfile
index 7266b82c4cec8dd52378cc4c28ee176b2b35ebad..993fcdd35643ad941305d657a52835e3e2c14680 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,7 @@ RUN apt-get -qq update \
   && apt-get -qq -y install --no-install-recommends \
   build-essential=12.* \
   git=1:2.* \
+  file=1:5.* \
   openscad=2019.* \
   pkg-config=0.29.* \
   python3-pip=20.* \
diff --git a/src/csg/CMakeLists.txt b/src/csg/CMakeLists.txt
index 4990c8b737d6ea7c634c6d75859720fd0db92782..a76a7a9ee98788fc8d7445823b1a1b7f0a2148c8 100644
--- a/src/csg/CMakeLists.txt
+++ b/src/csg/CMakeLists.txt
@@ -19,17 +19,22 @@ if (CSG_CGAL_ENABLED)
    )
 endif()
 
-add_library(csg-eb ${csg-eb_SOURCES})
-add_library(CsgEb::csg-eb ALIAS csg-eb)
+## Create a private interface library
+add_library(csg-eb-pi INTERFACE)
 
-target_link_libraries(csg-eb PRIVATE
+target_link_libraries(csg-eb-pi INTERFACE
                       stdc++fs
                       taocpp::pegtl
                       )
 if (CSG_CGAL_ENABLED)
-   target_link_libraries(csg-eb PRIVATE CGAL::CGAL)
+   target_link_libraries(csg-eb-pi INTERFACE CGAL::CGAL)
 endif()
 
+# Create a static library
+add_library(csg-eb ${csg-eb_SOURCES})
+add_library(CsgEb::csg-eb ALIAS csg-eb)
+target_link_libraries(csg-eb PRIVATE "$<BUILD_INTERFACE:csg-eb-pi>")
+
 if (BUILD_TESTING)
    add_subdirectory(tests)
 endif()