diff --git a/Cargo.lock b/Cargo.lock
index 7979d59..b1046bd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1137,7 +1137,7 @@ dependencies = [
 [[package]]
 name = "fancy_display"
 version = "0.1.0"
-source = "git+https://github.com/prefix-dev/pixi?branch=main#a0f8317b047e38365140dd0a8b69579fe6900f1e"
+source = "git+https://github.com/baszalmstra/pixi?branch=fix/build_protocol_more#9bc3d8e65dd45e15dbcd1d3820362bc319a1b023"
 dependencies = [
  "console",
 ]
@@ -3121,7 +3121,7 @@ dependencies = [
 [[package]]
 name = "pixi_build_type_conversions"
 version = "0.1.0"
-source = "git+https://github.com/prefix-dev/pixi?branch=main#a0f8317b047e38365140dd0a8b69579fe6900f1e"
+source = "git+https://github.com/baszalmstra/pixi?branch=fix/build_protocol_more#9bc3d8e65dd45e15dbcd1d3820362bc319a1b023"
 dependencies = [
  "indexmap 2.7.0",
  "itertools 0.13.0",
@@ -3134,7 +3134,7 @@ dependencies = [
 [[package]]
 name = "pixi_build_types"
 version = "0.1.0"
-source = "git+https://github.com/prefix-dev/pixi?branch=main#a0f8317b047e38365140dd0a8b69579fe6900f1e"
+source = "git+https://github.com/baszalmstra/pixi?branch=fix/build_protocol_more#9bc3d8e65dd45e15dbcd1d3820362bc319a1b023"
 dependencies = [
  "indexmap 2.7.0",
  "rattler_conda_types",
@@ -3148,7 +3148,7 @@ dependencies = [
 [[package]]
 name = "pixi_config"
 version = "0.1.0"
-source = "git+https://github.com/prefix-dev/pixi?branch=main#a0f8317b047e38365140dd0a8b69579fe6900f1e"
+source = "git+https://github.com/baszalmstra/pixi?branch=fix/build_protocol_more#9bc3d8e65dd45e15dbcd1d3820362bc319a1b023"
 dependencies = [
  "clap",
  "console",
@@ -3173,7 +3173,7 @@ dependencies = [
 [[package]]
 name = "pixi_consts"
 version = "0.1.0"
-source = "git+https://github.com/prefix-dev/pixi?branch=main#a0f8317b047e38365140dd0a8b69579fe6900f1e"
+source = "git+https://github.com/baszalmstra/pixi?branch=fix/build_protocol_more#9bc3d8e65dd45e15dbcd1d3820362bc319a1b023"
 dependencies = [
  "console",
  "rattler_cache",
@@ -3184,7 +3184,7 @@ dependencies = [
 [[package]]
 name = "pixi_git"
 version = "0.0.1"
-source = "git+https://github.com/prefix-dev/pixi?branch=main#a0f8317b047e38365140dd0a8b69579fe6900f1e"
+source = "git+https://github.com/baszalmstra/pixi?branch=fix/build_protocol_more#9bc3d8e65dd45e15dbcd1d3820362bc319a1b023"
 dependencies = [
  "dashmap",
  "dunce",
@@ -3205,7 +3205,7 @@ dependencies = [
 [[package]]
 name = "pixi_manifest"
 version = "0.1.0"
-source = "git+https://github.com/prefix-dev/pixi?branch=main#a0f8317b047e38365140dd0a8b69579fe6900f1e"
+source = "git+https://github.com/baszalmstra/pixi?branch=fix/build_protocol_more#9bc3d8e65dd45e15dbcd1d3820362bc319a1b023"
 dependencies = [
  "console",
  "dunce",
@@ -3238,7 +3238,7 @@ dependencies = [
 [[package]]
 name = "pixi_spec"
 version = "0.1.0"
-source = "git+https://github.com/prefix-dev/pixi?branch=main#a0f8317b047e38365140dd0a8b69579fe6900f1e"
+source = "git+https://github.com/baszalmstra/pixi?branch=fix/build_protocol_more#9bc3d8e65dd45e15dbcd1d3820362bc319a1b023"
 dependencies = [
  "dirs 5.0.1",
  "file_url",
@@ -3261,7 +3261,7 @@ dependencies = [
 [[package]]
 name = "pixi_toml"
 version = "0.1.0"
-source = "git+https://github.com/prefix-dev/pixi?branch=main#a0f8317b047e38365140dd0a8b69579fe6900f1e"
+source = "git+https://github.com/baszalmstra/pixi?branch=fix/build_protocol_more#9bc3d8e65dd45e15dbcd1d3820362bc319a1b023"
 dependencies = [
  "digest",
  "hex",
@@ -3274,7 +3274,7 @@ dependencies = [
 [[package]]
 name = "pixi_utils"
 version = "0.1.0"
-source = "git+https://github.com/prefix-dev/pixi?branch=main#a0f8317b047e38365140dd0a8b69579fe6900f1e"
+source = "git+https://github.com/baszalmstra/pixi?branch=fix/build_protocol_more#9bc3d8e65dd45e15dbcd1d3820362bc319a1b023"
 dependencies = [
  "async-fd-lock",
  "fs-err",
diff --git a/Cargo.toml b/Cargo.toml
index 951d398..fd38cf3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,8 +40,8 @@ rattler_conda_types = { version = "0.29.9", default-features = false }
 rattler_package_streaming = { version = "0.22.22", default-features = false }
 rattler_virtual_packages = { version = "1.1.17", default-features = false }
 
-pixi_build_types = { git = "https://github.com/prefix-dev/pixi", branch = "main" }
-pixi_consts = { git = "https://github.com/prefix-dev/pixi", branch = "main" }
-pixi_manifest = { git = "https://github.com/prefix-dev/pixi", branch = "main" }
-pixi_spec = { git = "https://github.com/prefix-dev/pixi", branch = "main" }
-pixi_build_type_conversions = { git = "https://github.com/prefix-dev/pixi", branch = "main" }
+pixi_build_types = { git = "https://github.com/baszalmstra/pixi", branch = "fix/build_protocol_more" }
+pixi_consts = { git = "https://github.com/baszalmstra/pixi", branch = "fix/build_protocol_more" }
+pixi_manifest = { git = "https://github.com/baszalmstra/pixi", branch = "fix/build_protocol_more" }
+pixi_spec = { git = "https://github.com/baszalmstra/pixi", branch = "fix/build_protocol_more" }
+pixi_build_type_conversions = { git = "https://github.com/baszalmstra/pixi", branch = "fix/build_protocol_more" }
diff --git a/crates/pixi-build/src/bin/pixi-build-cmake/cmake.rs b/crates/pixi-build/src/bin/pixi-build-cmake/cmake.rs
index 43ef0b4..68ed86e 100644
--- a/crates/pixi-build/src/bin/pixi-build-cmake/cmake.rs
+++ b/crates/pixi-build/src/bin/pixi-build-cmake/cmake.rs
@@ -213,8 +213,10 @@ impl CMakeBuildBackend {
     ) -> miette::Result<Recipe> {
         // Parse the package name from the manifest
         let project_model = &self.project_model;
-
         let name = PackageName::from_str(&project_model.name).into_diagnostic()?;
+        let version = self.project_model.version.clone().ok_or_else(|| {
+            miette::miette!("a version is missing from the package but it is required")
+        })?;
 
         let noarch_type = NoArchType::none();
 
@@ -236,7 +238,7 @@ impl CMakeBuildBackend {
             schema_version: 1,
             context: Default::default(),
             package: Package {
-                version: self.project_model.version.clone().into(),
+                version: version.into(),
                 name,
             },
             cache: None,
diff --git a/crates/pixi-build/src/bin/pixi-build-python/python.rs b/crates/pixi-build/src/bin/pixi-build-python/python.rs
index 52a4e15..9f98fbe 100644
--- a/crates/pixi-build/src/bin/pixi-build-python/python.rs
+++ b/crates/pixi-build/src/bin/pixi-build-python/python.rs
@@ -239,7 +239,9 @@ impl PythonBuildBackend {
     ) -> miette::Result<Recipe> {
         // Parse the package name and version from the manifest
         let name = PackageName::from_str(&self.project_model.name).into_diagnostic()?;
-        let version = self.project_model.version.clone();
+        let version = self.project_model.version.clone().ok_or_else(|| {
+            miette::miette!("a version is missing from the package but it is required")
+        })?;
 
         // Determine whether the package should be built as a noarch package or as a
         // generic package.