diff --git a/src/pikepdf/_methods.py b/src/pikepdf/_methods.py
index 2a170c6..5ee3ba1 100644
--- a/src/pikepdf/_methods.py
+++ b/src/pikepdf/_methods.py
@@ -80,7 +80,7 @@ def _mudraw(buffer, fmt) -> bytes:
         tmp_in.flush()
 
         proc = run(
-            ['mudraw', '-F', fmt, '-o', '-', tmp_in.name],
+            ['@mudraw@', '-F', fmt, '-o', '-', tmp_in.name],
             capture_output=True,
             check=True,
         )
diff --git a/src/pikepdf/jbig2.py b/src/pikepdf/jbig2.py
index 28c596b..aff3565 100644
--- a/src/pikepdf/jbig2.py
+++ b/src/pikepdf/jbig2.py
@@ -28,7 +28,7 @@ def _extract_jbig2_bytes(jbig2: bytes, jbig2_globals: bytes) -> bytes:
         output_path = Path(tmpdir) / "outfile"

         args = [
-            "jbig2dec",
+            "@jbig2dec@",
             "--embedded",
             "--format",
             "png",
@@ -88,7 +88,7 @@ class JBIG2Decoder(JBIG2DecoderInterface):
     def _version(self) -> Version:
         try:
             proc = run(
-                ['jbig2dec', '--version'], stdout=PIPE, check=True, encoding='ascii'
+                ['@jbig2dec@', '--version'], stdout=PIPE, check=True, encoding='ascii'
             )
         except (CalledProcessError, FileNotFoundError) as e:
             raise DependencyError("jbig2dec - not installed or not found") from e