diff --git a/BUILD.md b/BUILD.md
index ba70ecb..c88e466 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -268,10 +268,7 @@ test it.
    cd dangerzone
    ```
 
-2. Follow the Fedora instructions for setting up the development environment with the particularity of running the following instead of `poetry install`:
-   ```
-   poetry install
-   ```
+2. Follow the Fedora instructions for setting up the development environment.
 
 3. Build a dangerzone `.rpm` for qubes with the command
 
diff --git a/dangerzone/isolation_provider/base.py b/dangerzone/isolation_provider/base.py
index 693b4c7..d5816a8 100644
--- a/dangerzone/isolation_provider/base.py
+++ b/dangerzone/isolation_provider/base.py
@@ -125,48 +125,12 @@ class IsolationProvider(ABC):
             document.mark_as_failed()
 
     def ocr_page(self, pixmap: fitz.Pixmap, ocr_lang: str) -> bytes:
-        """Get a single page as pixels, OCR it, and return a PDF as bytes.
-
-        This operation is particularly tricky, since we have to handle various PyMuPDF
-        versions.
-        """
-        if int(fitz.version[2]) >= 20230621000001:
-            return pixmap.pdfocr_tobytes(
-                compress=True,
-                language=ocr_lang,
-                tessdata=get_tessdata_dir(),
-            )
-        else:
-            # XXX: In PyMuPDF v1.22.5, the function signature of
-            # `pdfocr_tobytes()` / `pdfocr_save()` was extended with an argument
-            # to explicitly set the Tesseract data dir [1].
-            #
-            # In earlier versions, the PyMuPDF developers recommend setting this
-            # path via the TESSDATA_PREFIX environment variable. In practice,
-            # this environment variable is read at import time, so subsequent
-            # changes to the environment variable are not tracked [2].
-            #
-            # To make things worse, any attempt to alter the internal attribute
-            # (`fitz.TESSDATA_PREFIX`) makes no difference as well, when using
-            # the OCR functions. That's due to the way imports work in `fitz`,
-            # where somehow the internal `fitz.fitz` module is shadowed.
-            #
-            # A hacky solution is to grab the `fitz.fitz` module from
-            # `sys.modules`, and set there the TESSDATA_PREFIX variable. We can
-            # get away with this hack because we have a proper solution for
-            # subsequent PyMuPDF versions, and we know that nothing will change
-            # in older versions.
-            #
-            # TODO: Remove after oldest distro has PyMuPDF >= v1.22.5
-            #
-            # [1]: https://pymupdf.readthedocs.io/en/latest/pixmap.html#Pixmap.pdfocr_save
-            # [2]: https://github.com/pymupdf/PyMuPDF/blob/0368e56cfa6afb55bcf6c726e7f51a2a16a5ccba/fitz/fitz.i#L308
-            sys.modules["fitz.fitz"].TESSDATA_PREFIX = get_tessdata_dir()  # type: ignore [attr-defined]
-
-            return pixmap.pdfocr_tobytes(
-                compress=True,
-                language=ocr_lang,
-            )
+        """Get a single page as pixels, OCR it, and return a PDF as bytes."""
+        return pixmap.pdfocr_tobytes(
+            compress=True,
+            language=ocr_lang,
+            tessdata=get_tessdata_dir(),
+        )
 
     def pixels_to_pdf_page(
         self,