diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f5e20d6..9201e30e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,7 +11,6 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - `fiboa create-stac-collection` describes the fiboa properties in `table:columns`.
 - Added `pixi run check-hcat`, which compares the HCAT mapping tables the converters read online with the taxonomy.
 - Added `FiboaDuckDBBaseConverter` for SQL-based conversion of large Parquet sources.
-- Added `PerFileBaseConverter` to process multi-file sources incrementally.
 - Added support for supplementary HCAT/crop mappings via `hcat_mapping_supplements`.
 - Added `get_hcat_mapping()` and `hcat_lookup()` to `AddHCATMixin` to load the HCAT mapping once and look up codes or names in it.
 - Added support for Esri JSON output and server-side filters in REST converters.
@@ -50,8 +49,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - `fiboa publish` no longer uploads to S3 or generates README/LICENSE files. It now creates GeoParquet, PMTiles and a STAC Collection with relative links, checksums and web-map-links.
 - Updated `aiohttp` to support Zenodo responses that include both returned `Content-Type` headers.
 - Improved geometry axis handling so generated tiles and bounding boxes keep x/y order consistent in output.
-- Updated vecorel-cli to 0.4.1:
+- Updated vecorel-cli to 0.4.2:
   - A converter can set `request_headers` for its downloads, e.g. a browser User-Agent.
+  - A converter can convert each source on its own and merge the parts (`PerFileConverterMixin`), for sources that do not fit into memory together.
+  - HTTP downloads no longer fail after 5 minutes.
+  - `--compression none` no longer fails in DuckDB-based conversions and merges.
   - The DuckDB converter downloads archives and other sources it cannot read in place also without a cache, and no longer turns `key=value` folders in a path into columns.
   - GeoParquet files under 250,000 rows get at least ten row groups, so a reader can skip by area.
   - `create-stac-collection` takes the bbox from the geometries, in EPSG:4326.
diff --git a/fiboa_cli/datasets/es.py b/fiboa_cli/datasets/es.py
index 742c803e..ab5b893e 100644
--- a/fiboa_cli/datasets/es.py
+++ b/fiboa_cli/datasets/es.py
@@ -1,13 +1,15 @@
 import re
 
 import requests
+from vecorel_cli.conversion.per_file import PerFileConverterMixin
 from vecorel_cli.vecorel.extensions import ADMIN_DIVISION
 
 from ..conversion.fiboa_converter import FiboaBaseConverter
 from .commons.hcat import AddHCATMixin
 
 
-class Converter(AddHCATMixin, FiboaBaseConverter):
+# 50 provincial GeoPackages that do not fit in memory together
+class Converter(PerFileConverterMixin, AddHCATMixin, FiboaBaseConverter):
     id = "es"
     short_name = "Spain"
     title = "Spain Declared Crops (Cultivos Declarados SIGPAC)"
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   name: fiboa-cli
   version: 0.21.0
-  sha256: cc05f5ea116fe87497bf02339b7f9bf7546850874c5fdd2d7da25d109dd97f56
+  sha256: 9db0cd7abe351cfb29587fd239a6f831829f4cf6d143121c973cfb51a9b04931
   requires_dist:
-  - vecorel-cli==0.4.1
+  - vecorel-cli==0.4.2
   - beautifulsoup4>=4.12
   - spdx-license-list==3.27.0
   requires_python: '>=3.11'
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-  version: 0.4.1
-  sha256: 7d08ad5a1193ac8c25d16da13cbf78dc441ce8b5746427979dfe7a15b7bd27d9
+  version: 0.4.2
+  sha256: 049adf899bb60646971d42e569e29c36c54a922758d6459a11364648322c5be9
   requires_dist:
   - pyyaml>=6.0,<7.0
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diff --git a/pyproject.toml b/pyproject.toml
index a97c66bc..0fc8c7f7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ classifiers = [
 ]
 requires-python = ">=3.11"
 dependencies = [
-    "vecorel-cli==0.4.1",
+    "vecorel-cli==0.4.2",
     "beautifulsoup4>=4.12",
     "spdx-license-list==3.27.0",
 ]
diff --git a/tests/test_per_file.py b/tests/test_per_file.py
new file mode 100644
index 00000000..45bebb44
--- /dev/null
+++ b/tests/test_per_file.py
@@ -0,0 +1,45 @@
+import sqlite3
+import zipfile
+
+import geopandas as gpd
+
+from fiboa_cli.converters import Converters
+
+FIXTURE = "tests/data-files/convert/es/1501_ALAVA_cd_2025_20250105.gpkg.zip"
+
+
+def _as_province(tmp_path, code):
+    """The fixture's GeoPackage, moved to another province, as a zip of its own."""
+    with zipfile.ZipFile(FIXTURE) as archive:
+        name = next(n for n in archive.namelist() if n.endswith(".gpkg"))
+        gpkg = archive.extract(name, tmp_path / "extracted")
+    with sqlite3.connect(gpkg) as db:
+        # the spatial index triggers call SpatiaLite functions that plain sqlite3 lacks
+        triggers = db.execute("SELECT name FROM sqlite_master WHERE type = 'trigger'").fetchall()
+        for (trigger,) in triggers:
+            db.execute(f'DROP TRIGGER "{trigger}"')
+        db.execute("UPDATE cultivo_declarado SET provincia = ?", (code,))
+    copy = tmp_path / f"province_{code}.gpkg.zip"
+    with zipfile.ZipFile(copy, "w") as archive:
+        archive.write(gpkg, name)
+    return copy
+
+
+def test_each_source_is_converted_on_its_own_and_merged(tmp_path):
+    from fiboa_cli import Registry  # noqa
+
+    copy = _as_province(tmp_path, 5)
+    output = tmp_path / "es.parquet"
+
+    Converters().load("es").convert(
+        str(output), input_files={FIXTURE: ["*.gpkg"], str(copy): ["*.gpkg"]}
+    )
+
+    merged = gpd.read_parquet(output)
+    assert len(merged) == 20  # 10 rows per source
+    assert merged["id"].is_unique
+    # constant within each part, so it only survives the merge as a column
+    assert sorted(merged["admin_province_code"].unique()) == ["01", "05"]
+    assert sorted(p.name for p in tmp_path.iterdir()) == sorted(
+        ["es.parquet", "extracted", copy.name]
+    )  # the parts are gone