diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e3ceb1b..4a8f2ad 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,24 +1,20 @@
-name: Python 🐍 CI tests
+name: Python 🐍 CI install check
 
 on:
   pull_request:
-    types: [closed]
     branches: [main]
     paths-ignore:
       - "**.md"
       - "**.bib"
-      - "**.ya?ml"
       - "LICENSE"
       - ".gitignore"
   workflow_dispatch:
 
 jobs:
-  test:
-    if: github.event_name == 'workflow_dispatch' || github.event.pull_request.merged == true
-    env:
-      SHIFT_SOLVER: highs
-      SHIFT_SOLVER_OPTIONS: highs-default
-      SHIFT_COMPUTE_IIS: "false"
+  install-check:
+    # No test suite exists yet (see tests/ removal history) - this job only
+    # confirms the pixi environment resolves and installs cleanly on both
+    # platforms. Replace with a real test job once tests/ exists again.
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -29,13 +25,10 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install Pixi
-        run: python -m pip install --upgrade pip pixi
+        uses: prefix-dev/setup-pixi@v0.9.0
 
-      - name: Install dependencies via Pixi (test env)
-        run: pixi install --environment test
+      - name: Install dependencies via Pixi (default env)
+        run: pixi install
 
       - name: Validate environment
-        run: pixi info --environment test
-
-      - name: Run tests
-        run: pixi run -e test unit-tests
+        run: pixi info
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 2088d4f..43f2f13 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -28,16 +28,4 @@ repos:
     rev: v1.0.0
     hooks:
       - id: snakefmt
-  
-  # Run some default pre-commit hooks
-  - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
-    hooks:
-      - id: check-added-large-files
-        args: ["--maxkb=2000"]
-      - id: check-merge-conflict
-      - id: check-yaml
-        exclude: "pixi.lock"
-      - id: end-of-file-fixer
-      - id: trailing-whitespace
 
diff --git a/environment.yaml b/environment.yaml
index fe20f3b..cbc9754 100644
--- a/environment.yaml
+++ b/environment.yaml
@@ -12,18 +12,14 @@ dependencies:
 - pypsa>=0.32.1
 - atlite>=0.3
 - linopy>=0.4.4
-- powerplantmatching>=0.5.15
 
 # Dependencies of the workflow itself
-- dask
-- xlrd
 - openpyxl
 - seaborn
 - snakemake-minimal>=9
 - snakemake-storage-plugin-http>=0.3
 - snakemake-executor-plugin-slurm
 - snakemake-executor-plugin-cluster-generic
-- memory_profiler
 - yaml
 - pytables
 - lxml
@@ -31,32 +27,21 @@ dependencies:
 - pandas>=2.1
 - geopandas>=1
 - xarray>=2024.03.0
-- rioxarray
 - netcdf4
 - libgdal-netcdf
 - networkx
 - scipy
-- glpk
 - shapely>=2.0
 - matplotlib
-- proj
-- fiona
-- country_converter
 - geopy
 - tqdm
-- pytz
-- jpype1
-- pyxlsb
-- graphviz
 - geojson
-- pyscipopt
+- graphviz
 - wbdata
 - searoute
 
 # GIS dependencies:
 - cartopy
-- descartes
-- rasterio
 
 # Development dependencies
 - jupyter
@@ -68,6 +53,5 @@ dependencies:
 - pip:
   - gurobipy
   - highspy
-  - tsam>=2.3.1
-  - entsoe-py
+  - wbgapi
   - pypsatopo
diff --git a/pixi.lock b/pixi.lock
index 0ce911f..b1115ee 100644
--- a/pixi.lock
+++ b/pixi.lock
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       - conda: https://conda.anaconda.org/conda-forge/noarch/entrypoints-0.4-pyhd8ed1ab_1.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/et_xmlfile-2.0.0-pyhd8ed1ab_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/exceptiongroup-1.3.1-pyhd8ed1ab_0.conda
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       - conda: https://conda.anaconda.org/conda-forge/linux-64/openldap-2.6.10-hbde042b_1.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/openpyxl-3.1.5-py312h7f6eeab_3.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/openssl-3.6.1-h35e630c_1.conda
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       - conda: https://conda.anaconda.org/conda-forge/noarch/entrypoints-0.4-pyhd8ed1ab_1.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/et_xmlfile-2.0.0-pyhd8ed1ab_1.conda
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+  size: 21908
+  timestamp: 1733749746332
 - conda: https://conda.anaconda.org/conda-forge/noarch/exceptiongroup-1.3.1-pyhd8ed1ab_0.conda
   sha256: ee6cf346d017d954255bbcbdb424cddea4d14e4ed7e9813e429db1d795d01144
   md5: 8e662bd460bda79b1ea39194e3c4c9ab
@@ -10269,6 +10298,36 @@ packages:
   purls: []
   size: 785570
   timestamp: 1771970256722
+- conda: https://conda.anaconda.org/conda-forge/linux-64/openpyxl-3.1.5-py312h7f6eeab_3.conda
+  sha256: 04839d313708a6b8c185bc9fcc56ccef985ed91520420c665b5e67b55fd8b5fb
+  md5: 04ab345ef65b88bcbb8ac3d083427bfc
+  depends:
+  - et_xmlfile
+  - libgcc >=14
+  - python >=3.12,<3.13.0a0
+  - python_abi 3.12.* *_cp312
+  license: MIT
+  license_family: MIT
+  purls:
+  - pkg:pypi/openpyxl?source=hash-mapping
+  size: 476128
+  timestamp: 1769122092500
+- conda: https://conda.anaconda.org/conda-forge/win-64/openpyxl-3.1.5-py312h83acffa_3.conda
+  sha256: 824eeb546a08c990eb461706280d3064c0437f67eb320018986fa439f468e43a
+  md5: ff342a314798173eaaf2753a22f044fa
+  depends:
+  - et_xmlfile
+  - python >=3.12,<3.13.0a0
+  - python_abi 3.12.* *_cp312
+  - ucrt >=10.0.20348.0
+  - vc >=14.3,<15
+  - vc14_runtime >=14.44.35208
+  license: MIT
+  license_family: MIT
+  purls:
+  - pkg:pypi/openpyxl?source=hash-mapping
+  size: 475979
+  timestamp: 1769122144585
 - conda: https://conda.anaconda.org/conda-forge/linux-64/openssl-3.6.1-h35e630c_1.conda
   sha256: 44c877f8af015332a5d12f5ff0fb20ca32f896526a7d0cdb30c769df1144fb5c
   md5: f61eb8cd60ff9057122a3d338b99c00f
@@ -13359,6 +13418,15 @@ packages:
   - mkdocstrings[python]>=0.30,<1 ; extra == 'docs'
   - pandas>=1,<3 ; extra == 'pandas'
   requires_python: '>=3.10,<4'
+- pypi: https://files.pythonhosted.org/packages/8f/9e/053111e07789d0dfcbb4ff334b06fdbe6ad8c567be0c6278d0a1781e0793/wbgapi-1.0.14-py3-none-any.whl
+  name: wbgapi
+  version: 1.0.14
+  sha256: abf43fcbbdc85a84c0774755e725df76ad5ae076b3ecc38a940fa718e14c514b
+  requires_dist:
+  - requests
+  - pyyaml
+  - tabulate
+  requires_python: '>=3.0'
 - conda: https://conda.anaconda.org/conda-forge/noarch/wcwidth-0.6.0-pyhd8ed1ab_0.conda
   sha256: e298b508b2473c4227206800dfb14c39e4b14fd79d4636132e9e1e4244cdf4aa
   md5: c3197f8c0d5b955c904616b716aca093
diff --git a/pixi.toml b/pixi.toml
index 58f7c00..f05e14c 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -39,11 +39,14 @@ snakemake-minimal = "==9.6.2"
 snakemake-storage-plugin-http = ">=0.3"
 tqdm = "*"
 xarray = ">=2026.0.0"
+openpyxl = ">=3.1.5,<4"
 
 [pypi-dependencies]
 # pip-installable packages (always included)
 gurobipy = "*"
 wbdata = ">=1.1.0"
+wbgapi = ">=1.0.14, <2"
+highspy = "*"
 
 [feature.test.dependencies]
 pytest = "*"