diff --git a/src/base/conversion.rs b/src/base/conversion.rs
index 2e5ca9df..fcb6907d 100644
--- a/src/base/conversion.rs
+++ b/src/base/conversion.rs
@@ -12,8 +12,10 @@ use typenum::Prod;
 use base::allocator::{Allocator, SameShapeAllocator};
 use base::constraint::{SameNumberOfColumns, SameNumberOfRows, ShapeConstraint};
 use base::dimension::{
-    Dim, DimName, Dynamic, U1, U10, U11, U12, U13, U14, U15, U16, U2, U3, U4, U5, U6, U7, U8, U9,
+    Dim, DimName, U1, U10, U11, U12, U13, U14, U15, U16, U2, U3, U4, U5, U6, U7, U8, U9,
 };
+#[cfg(any(feature = "std", feature = "alloc"))]
+use base::dimension::Dynamic;
 use base::iter::{MatrixIter, MatrixIterMut};
 use base::storage::{ContiguousStorage, ContiguousStorageMut, Storage, StorageMut};
 #[cfg(any(feature = "std", feature = "alloc"))]
diff --git a/src/base/edition.rs b/src/base/edition.rs
index 82e5d7ea..32e2c1aa 100644
--- a/src/base/edition.rs
+++ b/src/base/edition.rs
@@ -1,14 +1,18 @@
 use num::{One, Zero};
 use std::cmp;
 use std::ptr;
+#[cfg(any(feature = "std", feature = "alloc"))]
 use std::iter::ExactSizeIterator;
+#[cfg(any(feature = "std", feature = "alloc"))]
 use std::mem;
 
 use base::allocator::{Allocator, Reallocator};
 use base::constraint::{DimEq, SameNumberOfColumns, SameNumberOfRows, ShapeConstraint};
 use base::dimension::{
-    Dim, DimAdd, DimDiff, DimMin, DimMinimum, DimName, DimSub, DimSum, Dynamic, U1,
+    Dim, DimAdd, DimDiff, DimMin, DimMinimum, DimName, DimSub, DimSum, U1,
 };
+#[cfg(any(feature = "std", feature = "alloc"))]
+use base::dimension::Dynamic;
 use base::storage::{Storage, StorageMut};
 #[cfg(any(feature = "std", feature = "alloc"))]
 use base::DMatrix;
@@ -36,6 +40,7 @@ impl<N: Scalar + Zero, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
     }
 
     /// Creates a new matrix by extracting the given set of rows from `self`.
+    #[cfg(any(feature = "std", feature = "alloc"))]
     pub fn select_rows<'a, I>(&self, irows: I) -> MatrixMN<N, Dynamic, C>
         where I: IntoIterator<Item = &'a usize>,
               I::IntoIter: ExactSizeIterator + Clone,
@@ -66,6 +71,7 @@ impl<N: Scalar + Zero, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
     }
 
     /// Creates a new matrix by extracting the given set of columns from `self`.
+    #[cfg(any(feature = "std", feature = "alloc"))]
     pub fn select_columns<'a, I>(&self, icols: I) -> MatrixMN<N, R, Dynamic>
         where I: IntoIterator<Item = &'a usize>,
               I::IntoIter: ExactSizeIterator,
@@ -296,6 +302,7 @@ impl<N: Scalar, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
 
     /// Removes `n` consecutive columns from this matrix, starting with the `i`-th (included).
     #[inline]
+    #[cfg(any(feature = "std", feature = "alloc"))]
     pub fn remove_columns(self, i: usize, n: usize) -> MatrixMN<N, R, Dynamic>
     where
         C: DimSub<Dynamic, Output = Dynamic>,
@@ -378,6 +385,7 @@ impl<N: Scalar, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
 
     /// Removes `n` consecutive rows from this matrix, starting with the `i`-th (included).
     #[inline]
+    #[cfg(any(feature = "std", feature = "alloc"))]
     pub fn remove_rows(self, i: usize, n: usize) -> MatrixMN<N, Dynamic, C>
     where
         R: DimSub<Dynamic, Output = Dynamic>,
@@ -455,6 +463,7 @@ impl<N: Scalar, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
 
     /// Inserts `n` columns filled with `val` starting at the `i-th` position.
     #[inline]
+    #[cfg(any(feature = "std", feature = "alloc"))]
     pub fn insert_columns(self, i: usize, n: usize, val: N) -> MatrixMN<N, R, Dynamic>
     where
         C: DimAdd<Dynamic, Output = Dynamic>,
@@ -532,6 +541,7 @@ impl<N: Scalar, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
 
     /// Inserts `n` rows filled with `val` starting at the `i-th` position.
     #[inline]
+    #[cfg(any(feature = "std", feature = "alloc"))]
     pub fn insert_rows(self, i: usize, n: usize, val: N) -> MatrixMN<N, Dynamic, C>
     where
         R: DimAdd<Dynamic, Output = Dynamic>,
@@ -697,6 +707,7 @@ impl<N: Scalar, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
     }
 }
 
+#[cfg(any(feature = "std", feature = "alloc"))]
 impl<N: Scalar> DMatrix<N> {
     /// Resizes this matrix in-place.
     ///
@@ -704,7 +715,6 @@ impl<N: Scalar> DMatrix<N> {
     /// rows and/or columns than `self`, then the extra rows or columns are filled with `val`.
     ///
     /// Defined only for owned fully-dynamic matrices, i.e., `DMatrix`.
-    #[cfg(any(feature = "std", feature = "alloc"))]
     pub fn resize_mut(&mut self, new_nrows: usize, new_ncols: usize, val: N)
         where DefaultAllocator: Reallocator<N, Dynamic, Dynamic, Dynamic, Dynamic> {
         let placeholder = unsafe { Self::new_uninitialized(0, 0) };
@@ -714,6 +724,7 @@ impl<N: Scalar> DMatrix<N> {
     }
 }
 
+#[cfg(any(feature = "std", feature = "alloc"))]
 impl<N: Scalar, C: Dim> MatrixMN<N, Dynamic, C>
     where DefaultAllocator: Allocator<N, Dynamic, C> {
     /// Changes the number of rows of this matrix in-place.
@@ -732,6 +743,7 @@ impl<N: Scalar, C: Dim> MatrixMN<N, Dynamic, C>
     }
 }
 
+#[cfg(any(feature = "std", feature = "alloc"))]
 impl<N: Scalar, R: Dim> MatrixMN<N, R, Dynamic>
     where DefaultAllocator: Allocator<N, R, Dynamic> {
     /// Changes the number of column of this matrix in-place.
@@ -830,6 +842,7 @@ unsafe fn extend_rows<N: Scalar>(
 
 /// Extend the number of columns of the `Matrix` with elements from
 /// a given iterator.
+#[cfg(any(feature = "std", feature = "alloc"))]
 impl<N, R, S> Extend<N> for Matrix<N, R, Dynamic, S>
 where
     N: Scalar,
@@ -877,6 +890,7 @@ where
 
 /// Extend the number of rows of the `Vector` with elements from
 /// a given iterator.
+#[cfg(any(feature = "std", feature = "alloc"))]
 impl<N, S> Extend<N> for Matrix<N, Dynamic, U1, S>
 where
     N: Scalar,
@@ -897,6 +911,7 @@ where
     }
 }
 
+#[cfg(any(feature = "std", feature = "alloc"))]
 impl<N, R, S, RV, SV> Extend<Vector<N, RV, SV>> for Matrix<N, R, Dynamic, S>
 where
     N: Scalar,