diff --git a/.gitignore b/.gitignore
index ef420eeb19..9b788bee59 100644
--- a/.gitignore
+++ b/.gitignore
@@ -56,3 +56,4 @@
 /cmake-build-*
 /bypy/b
 /bypy/virtual-machines.conf
+*.egg-info
diff --git a/pyproject.toml b/pyproject.toml
index 73824a29e3..2ba9178b81 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "calibre"
 description = "The one stop solution to all your e-book needs"
 readme = "README.md"
 requires-python = ">=3.10"
-license = "GPL-3.0-only"
+license = {text="GPL-3.0-only"}
 dynamic = ["version"]
 dependencies = [
 	"six == 1.16.0",
@@ -76,7 +76,7 @@ requires = [
 	# Some packages (xxhash/py7zr/etc) erroneously declare this as a dependency even
 	# though it is needed only for sdist not building wheels
 	"setuptools_scm == 8.0.3",
-	"poetry_core 1.7.0",  # needed for building zeroconf
+	"poetry_core == 1.7.0",  # needed for building zeroconf
 	"ply == 3.11",  # needed for sip
 	"sip == 6.10.0",
 	"PyQt_builder == 1.18.1",