diff --git a/src/python/supply/supply.go b/src/python/supply/supply.go
index f9bef58f..44cb9499 100644
--- a/src/python/supply/supply.go
+++ b/src/python/supply/supply.go
@@ -747,14 +747,14 @@ func (s *Supplier) InstallCommonBuildDependencies() error {
 	if err := s.Installer.InstallOnlyVersion("pip", tempPath); err != nil {
 		return err
 	}
-	if err := s.Installer.InstallOnlyVersion("flit-core", tempPath); err != nil {
-		return err
-	}
-
-	s.Log.Info("Installing build-time dependency flit-core (bootstrap)")
-	args := []string{tempPath, "--no-build-isolation"}
-	if err := s.runPipInstall(args...); err != nil {
-		return fmt.Errorf("could not bootstrap-install flit-core: %v", err)
+	for _, dep := range []string{"flit-core", "poetry-core"} {
+		if err := s.Installer.InstallOnlyVersion(dep, tempPath); err != nil {
+			return fmt.Errorf("could not prepare build-time dependency %s: %v", dep, err)
+		}
+		s.Log.Info("Installing build-time dependency %s (bootstrap)", dep)
+		if err := s.runPipInstall(tempPath, "--no-build-isolation"); err != nil {
+			return fmt.Errorf("could not bootstrap-install %s: %v", dep, err)
+		}
 	}
 
 	for _, dep := range []string{"wheel", "setuptools"} {
@@ -764,6 +764,8 @@ func (s *Supplier) InstallCommonBuildDependencies() error {
 			return fmt.Errorf("could not install build-time dependency %s: %v", dep, err)
 		}
 	}
+
+
 	return nil
 }
 
diff --git a/src/python/supply/supply_test.go b/src/python/supply/supply_test.go
index 366268d5..a8d15d41 100644
--- a/src/python/supply/supply_test.go
+++ b/src/python/supply/supply_test.go
@@ -633,10 +633,12 @@ MarkupSafe==2.0.1
 
 	Describe("InstallCommonBuildDependencies", func() {
 		Context("successful installation", func() {
-			It("bootstraps flit-core, wheel and setuptools", func() {
+			It("bootstraps flit-core, poetry-core, wheel and setuptools", func() {
 				mockInstaller.EXPECT().InstallOnlyVersion("pip", "/tmp/common_build_deps")
 				mockInstaller.EXPECT().InstallOnlyVersion("flit-core", "/tmp/common_build_deps")
 				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "/tmp/common_build_deps", "--no-build-isolation")
+				mockInstaller.EXPECT().InstallOnlyVersion("poetry-core", "/tmp/common_build_deps")
+				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "/tmp/common_build_deps", "--no-build-isolation")
 				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "wheel", "--no-index", "--no-build-isolation", "--upgrade-strategy=only-if-needed", "--find-links=/tmp/common_build_deps")
 				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "setuptools", "--no-index", "--no-build-isolation", "--upgrade-strategy=only-if-needed", "--find-links=/tmp/common_build_deps")
 
@@ -644,20 +646,43 @@ MarkupSafe==2.0.1
 			})
 		})
 
-	Context("flit-core bootstrap fails", func() {
-		It("returns a useful error message", func() {
-			mockInstaller.EXPECT().InstallOnlyVersion("pip", "/tmp/common_build_deps")
-			mockInstaller.EXPECT().InstallOnlyVersion("flit-core", "/tmp/common_build_deps")
-			mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "/tmp/common_build_deps", "--no-build-isolation").Return(fmt.Errorf("bootstrap-error"))
-			Expect(supplier.InstallCommonBuildDependencies()).To(MatchError("could not bootstrap-install flit-core: bootstrap-error"))
+		Context("flit-core bootstrap fails", func() {
+			It("returns a useful error message", func() {
+				mockInstaller.EXPECT().InstallOnlyVersion("pip", "/tmp/common_build_deps")
+				mockInstaller.EXPECT().InstallOnlyVersion("flit-core", "/tmp/common_build_deps")
+				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "/tmp/common_build_deps", "--no-build-isolation").Return(fmt.Errorf("bootstrap-error"))
+				Expect(supplier.InstallCommonBuildDependencies()).To(MatchError("could not bootstrap-install flit-core: bootstrap-error"))
+			})
+		})
+
+		Context("poetry-core preparation fails", func() {
+			It("returns a useful error message", func() {
+				mockInstaller.EXPECT().InstallOnlyVersion("pip", "/tmp/common_build_deps")
+				mockInstaller.EXPECT().InstallOnlyVersion("flit-core", "/tmp/common_build_deps")
+				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "/tmp/common_build_deps", "--no-build-isolation")
+				mockInstaller.EXPECT().InstallOnlyVersion("poetry-core", "/tmp/common_build_deps").Return(fmt.Errorf("prepare-error"))
+				Expect(supplier.InstallCommonBuildDependencies()).To(MatchError("could not prepare build-time dependency poetry-core: prepare-error"))
+			})
+		})
+
+		Context("poetry-core bootstrap fails", func() {
+			It("returns a useful error message", func() {
+				mockInstaller.EXPECT().InstallOnlyVersion("pip", "/tmp/common_build_deps")
+				mockInstaller.EXPECT().InstallOnlyVersion("flit-core", "/tmp/common_build_deps")
+				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "/tmp/common_build_deps", "--no-build-isolation")
+				mockInstaller.EXPECT().InstallOnlyVersion("poetry-core", "/tmp/common_build_deps")
+				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "/tmp/common_build_deps", "--no-build-isolation").Return(fmt.Errorf("poetry-error"))
+				Expect(supplier.InstallCommonBuildDependencies()).To(MatchError("could not bootstrap-install poetry-core: poetry-error"))
+			})
 		})
-	})
 
 		Context("wheel installation fails", func() {
 			It("returns a useful error message", func() {
 				mockInstaller.EXPECT().InstallOnlyVersion("pip", "/tmp/common_build_deps")
 				mockInstaller.EXPECT().InstallOnlyVersion("flit-core", "/tmp/common_build_deps")
 				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "/tmp/common_build_deps", "--no-build-isolation")
+				mockInstaller.EXPECT().InstallOnlyVersion("poetry-core", "/tmp/common_build_deps")
+				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "/tmp/common_build_deps", "--no-build-isolation")
 				mockCommand.EXPECT().Execute(buildDir, gomock.Any(), gomock.Any(), "python", "-m", "pip", "install", "wheel", "--no-index", "--no-build-isolation", "--upgrade-strategy=only-if-needed", "--find-links=/tmp/common_build_deps").Return(fmt.Errorf("some-pip-error"))
 				Expect(supplier.InstallCommonBuildDependencies()).To(MatchError("could not install build-time dependency wheel: some-pip-error"))
 			})