diff --git a/.github/workflows/test_dev.yml b/.github/workflows/test_dev.yml
new file mode 100644
index 0000000..e649a09
--- /dev/null
+++ b/.github/workflows/test_dev.yml
@@ -0,0 +1,61 @@
+name: Development Tests
+
+on:
+  schedule:
+    - cron: 0 0 * * *
+  workflow_dispatch:
+  push:
+    paths:
+      - '.github/**'
+      - 'test/CoolPropDevLoader/**'
+
+permissions:
+  contents: read
+
+  concurrency:
+  # Skip intermediate builds: all builds except for builds on the `master` branch
+  # Cancel intermediate builds: only pull request builds
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.ref != 'refs/heads/master' || github.run_number }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+jobs:
+  test-coolprop-dev:
+    timeout-minutes: 30
+    strategy:
+      matrix:
+        julia_version:
+          - '1.12'
+        os:
+          - ubuntu-latest
+        julia_arch:
+          - x64
+      fail-fast: false
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v7
+
+    - uses: julia-actions/setup-julia@v3
+      with:
+        arch: ${{ matrix.julia_arch }}
+        version: ${{ matrix.julia_version }}
+    - uses: julia-actions/cache@v3
+
+    - name: add CoolPropDevLoader
+      shell: julia --color=yes --project=. {0}
+      run: |
+        using Pkg
+        Pkg.develop(path="test/CoolPropDevLoader")
+
+    - name: Compiling CoolProp
+      shell: julia --color=yes --compiled-modules=no --project=test {0}
+      run: |
+        using Pkg
+        Pkg.develop(path="test/CoolPropDevLoader")
+        using CoolPropDevLoader
+        CoolPropDevLoader.use_dev_library(CoolPropDevLoader.CompileCoolPropFromSourceforge())
+        Pkg.add("Test")
+
+    - uses: julia-actions/julia-runtest@v1
+    
\ No newline at end of file
diff --git a/Project.toml b/Project.toml
index 8d3eb71..5ed719e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -5,12 +5,14 @@ version = "0.2.2"
 [deps]
 CoolProp_jll = "3351c21f-4feb-5f29-afb9-f4fcb0e27549"
 Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
+Preferences = "21216c6a-2e73-6563-6e65-726566657250"
 Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 
 [compat]
 CoolProp_jll = "6.6, 7.1"
 julia = "1.3"
-Unitful="1"
+Preferences = "1"
+Unitful = "1"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
diff --git a/README.md b/README.md
index 68a2f27..5d6d768 100644
--- a/README.md
+++ b/README.md
@@ -38,4 +38,4 @@ using Unitful: °C, Pa
 
 HAPropsSI("H", "Tdb", 20°C, "RH", 0.5, "P", 101325Pa)
 38622.83892391293 J kg⁻¹
-```
+```
\ No newline at end of file
diff --git a/src/CoolProp.jl b/src/CoolProp.jl
index 9a7b964..abe5afb 100644
--- a/src/CoolProp.jl
+++ b/src/CoolProp.jl
@@ -1,8 +1,20 @@
 #__precompile__()
 module CoolProp
 
+
+
 import Unitful
-using CoolProp_jll
+import CoolProp_jll
+
+@static if VERSION >= v"1.6"
+    using Preferences
+end
+
+@static if VERSION >= v"1.6"
+    const libcoolprop = load_preference(CoolProp_jll,"coolprop_library", CoolProp_jll.libcoolprop)
+else
+    const libcoolprop = CoolProp_jll.libcoolprop
+end
 
 ####################################################################################################################
 ####################################################################################################################
diff --git a/test/CoolProp.jl b/test/CoolProp.jl
index 46c7d51..0c36e6d 100644
--- a/test/CoolProp.jl
+++ b/test/CoolProp.jl
@@ -1,6 +1,8 @@
 #__precompile__()
 module CoolProp
 
+@info "CoolProp library path: $(CoolProp.libcoolprop)"
+
 errcode = Ref{Clong}(0)
 const buffer_length = 20000
 message_buffer = Array(UInt8, buffer_length)
diff --git a/test/CoolPropDevLoader/Project.toml b/test/CoolPropDevLoader/Project.toml
new file mode 100644
index 0000000..b2860ca
--- /dev/null
+++ b/test/CoolPropDevLoader/Project.toml
@@ -0,0 +1,20 @@
+name = "CoolPropDevLoader"
+uuid = "1abf7821-c65a-4ba0-83a4-5660520f37c7"
+version = "1.0.0"
+
+[deps]
+Downloads = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
+Preferences = "21216c6a-2e73-6563-6e65-726566657250"
+CoolProp_jll = "3351c21f-4feb-5f29-afb9-f4fcb0e27549"
+
+[compat]
+Downloads = "1"
+julia = "1.6"
+Preferences = "1"
+CoolProp_jll = "6.6, 7.1"
+
+[extras]
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[targets]
+test = ["Test"]
diff --git a/test/CoolPropDevLoader/src/CoolPropDevLoader.jl b/test/CoolPropDevLoader/src/CoolPropDevLoader.jl
new file mode 100644
index 0000000..0aa5750
--- /dev/null
+++ b/test/CoolPropDevLoader/src/CoolPropDevLoader.jl
@@ -0,0 +1,110 @@
+module CoolPropDevLoader
+
+using Preferences
+using Downloads
+using CoolProp_jll
+
+const SOURCEFORGE_URL = "https://sourceforge.net/projects/coolprop/files/CoolProp/nightly/source/CoolProp_sources.zip/download"
+
+#only available in linux
+function compile_from_sourceforge()
+    # 1. Configuration
+    url = SOURCEFORGE_URL
+    build_dir = joinpath(@__DIR__, "coolprop_build")  # Change as needed
+    source_zip = joinpath(build_dir, "CoolProp_sources.zip")
+    extract_dir = build_dir  # We'll extract directly into build_dir, then locate source root
+    lib_name = "libCoolProp.so"
+    
+    # 2. Create build directory
+    mkpath(build_dir)
+    mkpath(extract_dir)
+
+    # 3. Download the source zip
+    @info "Downloading CoolProp source from $url..."
+    Downloads.download(SOURCEFORGE_URL, source_zip)
+    
+    # 4. Extract the zip into build_dir
+    @info "Extracting source..."
+    run(`unzip -qo $source_zip -d $build_dir`)
+    
+    # 5. Find the actual source root: a directory that contains CMakeLists.txt
+    @info "Locating source root..."
+    function find_cmakelists_root(dir)
+        # Check if dir itself contains CMakeLists.txt
+        if isfile(joinpath(dir, "CMakeLists.txt"))
+            return dir
+        end
+        # Otherwise, look for a subdirectory that contains it
+        for entry in readdir(dir)
+            path = joinpath(dir, entry)
+            if isdir(path) && isfile(joinpath(path, "CMakeLists.txt"))
+                return path
+            end
+        end
+        # If not found, search recursively (but be careful with deep structures)
+        for (root, dirs, files) in walkdir(dir)
+            if "CMakeLists.txt" in files
+                return root
+            end
+        end
+        error("Could not find CMakeLists.txt anywhere in $dir")
+    end
+    
+    source_root = find_cmakelists_root(extract_dir)
+    @info "Source root found at: $source_root"
+    
+    # 6. Prepare for CMake build: create a build subdirectory inside source_root
+    build_subdir = joinpath(source_root, "build")
+    mkpath(build_subdir)
+    cd(build_subdir) do
+        # 7. Configure with CMake - build shared library
+        @info "Configuring with CMake..."
+        run(`cmake .. -DCOOLPROP_SHARED_LIBRARY=ON -DCMAKE_BUILD_TYPE=Release`)
+        
+        # 8. Build
+        @info "Compiling CoolProp (this may take a few minutes)..."
+        run(`cmake --build . --config Release --parallel $(Sys.CPU_THREADS)`)
+    end
+    
+    # 9. Locate the generated shared library
+    # The library is typically in build/ or build/Release/ or build/lib/
+    possible_paths = [
+        joinpath(source_root, "build", lib_name),
+        joinpath(source_root, "build", "Release", lib_name),
+        joinpath(source_root, "build", "lib", lib_name),
+    ]
+    
+    lib_path = nothing
+    for p in possible_paths
+        if isfile(p)
+            lib_path = p
+            break
+        end
+    end
+    
+    if lib_path === nothing
+        error("Could not find compiled library. Looked in: $(join(possible_paths, ", "))")
+    end
+    
+    @info "CoolProp library built successfully at: $lib_path"
+    return lib_path
+end
+
+struct CompileCoolPropFromSourceforge end
+
+function use_dev_library(::CompileCoolPropFromSourceforge)
+    lib_src = compile_from_sourceforge()
+    set_preferences!(CoolProp_jll,"coolprop_library" => lib_src, force = true)
+    @info "Preference set to $lib_src"
+end
+
+function use_dev_library(lib_src::String)
+    set_preferences!(CoolProp_jll,"coolprop_library" => lib_src, force = true)
+    @info "Preference set to $lib_src"
+end
+
+function use_default_library()
+    delete_preferences!(CoolProp_jll,"coolprop_library",force = true,export_prefs = true)
+end
+
+end #module
\ No newline at end of file